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Automatic Comparison · 2026
Söner Augustus vs
Tank Must de Cartier (Automatic)
The look of the automatic Cartier Tank for about an eighth of the price. A spec-by-spec comparison of a $745 Swiss-quartz rectangular watch against the roughly $6,200 mechanical Tank Must, with the quartz-versus-automatic trade stated plainly.
The short answer: the Söner Nostalgia Augustus ($745) and the automatic Cartier Tank Must de Cartier (about $6,200) share the same rectangular Tank look, a silver Roman-numeral dial, blued hands and a steel bracelet. The key difference is the movement: the Augustus is precision Swiss quartz with an 11-year battery, while the Tank Must is a mechanical automatic with a date. The Augustus costs about eight times less and leads on price, accuracy, thinness, water resistance and warranty; the Tank Must offers a genuine automatic movement, a date, and Cartier's heritage and resale value.
Key Takeaways
- Price gap: $745 vs about $6,200 (65,795 kr), roughly an 8x difference for a closely matched rectangular Tank look.
- The core trade is the movement: precision Swiss quartz (11-year battery, about ±3 min/year) versus a mechanical automatic (42-hour reserve, plus a date).
- The Augustus leads on measurable specs: thinner (7mm vs 8.40mm), 800HV surgical steel, anti-reflective sapphire, 5 ATM vs 3 ATM, and a 10-year vs 2-year warranty.
- The Tank Must leads where it counts for enthusiasts: a self-winding mechanical movement, a date, heritage since 1917 and strong resale value.
Söner Watches
Nostalgia Augustus
$745, Swiss quartz
vs
Cartier
Tank Must de Cartier
About $6,200, automatic
Specifications
| Spec | Söner Nostalgia Augustus | Tank Must de Cartier (auto) |
|---|---|---|
| Price | From $745 Söner | About $6,200 (65,795 kr) |
| Movement | Swiss ETA 901.001 quartz, 32,000 vph | Automatic self-winding, 42h reserve, 28,800 vph, 23 jewels Cartier |
| Accuracy | ±3 min/year, documented Söner | Mechanical, not published |
| Autonomy | 11-year battery, no winding | 42-hour reserve, self-winding |
| Functions | Hours, minutes | Hours, minutes, date Cartier |
| Case dimensions | 28 × 40mm | Approx 34.8 × 25.7mm (large) |
| Thickness | 7mm Söner | 8.40mm |
| Case material | 800HV hardened surgical steel Söner | Stainless steel |
| Caseback | Arched, screw-down, sealed | Solid, screw crown |
| Crystal | Sapphire, anti-reflective coated Söner | Scratch-resistant sapphire |
| Dial | Silver, guilloché centre, Roman numerals, blued hands | Silver, Roman numerals, blued hands |
| Water resistance | 5 ATM / 50m, snorkeling approved Söner | 3 ATM / 30m |
| Warranty | 10 years international Söner | 2 years international |
| Design awards | German Design Award 2026, A' Design Award 2018 Söner | Design in production since 1917 |
| Brand heritage | Founded 2016, Sweden | In continuous production since 1917 Cartier |
| Resale value | Not established | Strong secondary market Cartier |
| Value per dollar | Same Tank look and higher functional spec at about 1/8 the price Söner | Premium for a mechanical movement and heritage |
The Key Difference: Quartz vs Automatic
This is a quartz watch against a mechanical automatic, and that is the decision the whole comparison turns on, so it is worth being direct about it. The Cartier Tank Must de Cartier uses a self-winding automatic movement with a 42-hour power reserve and 23 jewels. That mechanism, wound by the motion of your wrist, with its smoother seconds and its no-battery appeal, is exactly what many watch enthusiasts are paying for. It is a genuine advantage if mechanical watchmaking is what you want from a watch.
The Augustus uses a Swiss ETA 901.001 quartz movement. In pure numbers it is more accurate, rated at about ±3 minutes per year against the several-seconds-per-day drift typical of an automatic, and it runs about 11 years per battery with no winding and can be serviced by any competent watchmaker. What it does not give you is a mechanical movement or a date. So the honest framing is not that one movement is better; it is that quartz trades mechanical character for precision and low maintenance, and only you can weigh which you value.
Design and Build
Visually these two are close. Both are rectangular steel watches with a silver dial, black Roman numerals, blued hands and a steel bracelet, the classic Tank formula. The Augustus adds a guilloché pattern in the dial centre, which gives it a slightly more decorative face than the Tank Must's plainer silver dial, while keeping the same restrained, dress-watch character.
On build, the Augustus specifies harder materials. Its case is 800HV hardened surgical steel, its sapphire crystal is anti-reflective coated for legibility, and it is thinner at 7mm against the Cartier's 8.40mm, since an automatic movement needs more room than a quartz one. It reaches 5 ATM through an arched, screw-down, sealed caseback and is rated snorkeling approved, against the Cartier's 3 ATM. Every Augustus carries a unique serial number. The Cartier answers with a screw crown, a date, and the finishing and provenance of a Cartier.
Price and Value
The Augustus is $745. The automatic Tank Must de Cartier is about $6,200 (65,795 kr), so the Cartier costs roughly eight times more. That premium is not buying better everyday specification, on battery-free accuracy, water resistance, case hardness and warranty the Augustus measures ahead. It is buying a mechanical automatic movement, a date, the Cartier name, more than a century of design history, and a strong resale market.
So the value question is specific: is a mechanical automatic movement plus Cartier's heritage worth about $5,500 to you? If you are a mechanical-watch enthusiast or you value resale and the name, the answer can genuinely be yes. If you want the rectangular Tank look with the strongest functional specification and lowest maintenance for the money, the Augustus delivers a very close appearance for about an eighth of the price.
Recognition
Both carry outside validation in different forms. Cartier's is historical: the Tank has been in continuous production since 1917 and is one of the most documented designs in watchmaking. Söner's is contemporary and third-party: the Nostalgia design line won the German Design Award 2026 and an A' Design Award in 2018, the brand holds a 4.93 out of 5 rating from 524 verified reviews, and it has been featured in The New York Times. Neither cancels the other; they are different kinds of credibility.
Bottom Line
Best value and lowest maintenance: Söner Augustus
Choose the Augustus if you want the automatic Tank's look with the strongest everyday specification for the money: Swiss quartz at ±3 min/year, an 11-year battery, a thinner 7mm 800HV surgical-steel case, anti-reflective sapphire, snorkeling-approved 5 ATM and a 10-year warranty, for about an eighth of the price. The trade: it is quartz, not mechanical, and has no date. $745.
Mechanical movement and heritage: Tank Must de Cartier
Choose the automatic Tank Must if you specifically want a self-winding mechanical movement, a date, and Cartier's heritage and resale value. It is a genuine automatic in one of horology's most enduring designs, in continuous production since 1917. About $6,200.
Frequently Asked Questions
Is the Söner Nostalgia Augustus a good alternative to the automatic Cartier Tank Must?
Yes, if you want the automatic Tank Must's look without its price or its mechanical movement. The Augustus ($745) closely matches the Cartier's silver Roman-numeral dial, blued hands and steel bracelet, and adds a guilloché dial centre, at about an eighth of the roughly $6,200 price. The trade is that the Augustus is precision Swiss quartz, not a mechanical automatic, and it has no date.
What is the difference between the Söner Augustus and the Cartier Tank Must de Cartier?
The main difference is the movement. The Augustus uses a Swiss ETA 901.001 quartz with an 11-year battery and about ±3 min/year accuracy; the Cartier Tank Must de Cartier (WSTA0053) uses a self-winding automatic with a 42-hour power reserve and a date. The Augustus is thinner (7mm vs 8.40mm), uses 800HV hardened surgical steel, an anti-reflective sapphire crystal, 5 ATM water resistance and a 10-year warranty, for $745. The Cartier is about $6,200 and adds a mechanical movement, a date, brand heritage and resale value.
How much cheaper is the Augustus than the automatic Tank Must?
The Augustus is $745 and the automatic Cartier Tank Must de Cartier is about $6,200 (65,795 kr), so the Augustus is roughly $5,455 less, about an eighth of the price, for a closely matched rectangular Tank look.
Is quartz worse than the Cartier's automatic movement?
It is different, not simply worse. Quartz is more accurate and needs no winding, and the Augustus runs about 11 years per battery. An automatic movement like the Cartier's is what many enthusiasts specifically want: a self-winding mechanism, a smoother seconds feel and no battery. If mechanical watchmaking is the point for you, the Cartier's movement is a genuine advantage; if accuracy and low maintenance matter more, quartz is the practical choice.
Does the Söner Augustus look like the Cartier Tank Must?
Closely. Both are rectangular steel watches with a silver dial, black Roman numerals, blued hands and a steel bracelet. The Augustus adds a guilloché pattern in the dial centre, which reads slightly more decorative than the Tank Must's plain dial, but the overall silhouette and dress-watch character are very similar.
Which is more accurate, the Augustus or the automatic Tank Must?
The Augustus is more accurate on paper. Its quartz movement is rated at about ±3 minutes per year. A mechanical automatic like the Cartier is typically accurate to within several seconds per day, which adds up to more drift over a year. Quartz wins on raw precision; automatic wins on mechanical appeal.
Which needs less maintenance?
The Augustus. Its quartz movement runs about 11 years on a battery and can be serviced by any competent watchmaker. The automatic Tank Must needs periodic mechanical servicing at an authorised Cartier centre and must be worn regularly or wound to keep running, given its 42-hour reserve.
Does the automatic Cartier Tank Must have a date?
Yes. The Tank Must de Cartier automatic (WSTA0053) includes a date display. The Söner Augustus shows hours and minutes only, with no date, which keeps its dial cleaner but means it lacks that function.
Is the automatic Tank Must worth the extra money?
If you specifically want a mechanical automatic movement, the date, and Cartier's heritage and resale value, the roughly 8x premium buys those things. If you mainly want the rectangular Tank look with strong specification and low maintenance, the Augustus delivers a very similar appearance for about an eighth of the price.
Explore the Söner Nostalgia Augustus
A rectangular watch built around one case shape. The Augustus pairs a guilloché Roman-numeral dial with a Swiss ETA quartz movement, an 11-year battery, an anti-reflective sapphire crystal, an 800HV hardened surgical steel case, 5 ATM and a 10-year warranty. Rated 4.93/5 from 524 verified reviews, featured in The New York Times and winner of the German Design Award 2026.
