Is your 104
the real deal?
The Sinn 104 is one of the most celebrated pilot watches under $2,000, featuring a classic pilot dial, bidirectional bezel, and day-date display. Its strong reputation and growing demand have made it an increasingly common target for counterfeiters.
How to authenticate a 104
Bidirectional Pilot Bezel
The 104 features a coin-edge bidirectional bezel with a triangular marker at 12 o'clock and minute markers. The bezel should rotate smoothly in both directions with precise, tactile clicks. The triangle marker should be filled with lume. Counterfeits have loose bezels with imprecise clicks and poorly filled lume.
Day-Date Display
The 104 shows the day of the week at 3 o'clock and date in a window, both with crisp white text on dark discs. The day and date should change precisely at midnight. The text should be perfectly centered in the windows. Counterfeits have misaligned day/date displays or incorrect fonts.
SW 220-1 Movement
The 104 uses a Sellita SW 220-1 automatic movement (or earlier ETA 2836-2). Through the exhibition case back, the movement should show proper finishing with a Sinn-signed rotor. The movement should keep accurate time within COSC-adjacent tolerances. Counterfeits use generic Asian movements.
Pilot Dial Layout
The 104 dial features large Arabic numerals (12, 3, 6, 9) with baton indices at other positions, all filled with SuperLuminova. The "Sinn" text and "FRANKFURT AM MAIN" should be precisely printed. The dial should be highly legible. Counterfeits have wrong numeral fonts and poor printing quality.
41mm Case Proportions
The 104 has a 41mm case diameter with a specific lug-to-lug distance and case thickness that gives it a balanced, wearable profile. The case is polished on some variants and brushed on others. The proportions should match Sinn's published specifications exactly. Counterfeits often have slightly wrong dimensions.
200m Water Resistance
The 104 is water resistant to 200 meters with a screw-down crown and screw-down case back. The crown should thread in cleanly and seat firmly. The case back should seal properly. Never test water resistance yourself — but the watch should not fog or show moisture. Counterfeits lack proper sealing.
104 counterfeit warning signs
Loose Bezel
The 104's bezel should rotate with precise clicks in both directions. If the bezel feels loose, rattles, or rotates without clicks, the bezel mechanism is not genuine.
Wrong Numeral Style
The 104 uses specific Arabic numerals in a pilot watch tradition. If the 12, 3, 6, and 9 are in a different style, weight, or font than reference images, the dial is counterfeit.
No Exhibition Case Back
Genuine 104 models have a sapphire exhibition case back showing the movement. If the case back is solid steel with no window (on the standard model), it may be hiding a counterfeit movement.
Misaligned Day-Date
The day and date displays should be perfectly framed in their windows with the text centered. If either appears crooked, off-center, or partially obscured, the movement is a poorly fitting counterfeit.
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Frequently asked questions
Is the Sinn 104 a good pilot watch?
The Sinn 104 is widely considered one of the best pilot watches available under $2,000. It combines a classic, highly legible pilot dial with practical features like 200-meter water resistance, a bidirectional bezel, day-date display, and SuperLuminova. It draws from Sinn's heritage of building watches for actual pilots and offers excellent build quality. Many watch reviewers rank it among the top value propositions in the pilot watch category.
What are the Sinn 104 variants?
The 104 comes in several dial variants: the 104 St Sa (white dial with Arabic numerals), 104 St Sa A (anthracite/dark dial), and 104 St Sa I (instrument-style with baton indices). There are also limited editions. All share the same 41mm case and SW 220-1 movement but differ in dial color, finishing, and index style. Bracelet and strap options are also available.
How much does a Sinn 104 cost?
The Sinn 104 retails for approximately $1,500-$1,800 depending on the variant and strap/bracelet choice. The bracelet version typically costs more than the leather strap option. On the secondary market, used examples can be found for $1,100-$1,400. This pricing positions the 104 as a strong value compared to pilot watches from Swiss brands at two to three times the price.