SINN 4 ATM

This model is identical to the Jaeger 4 ATM. The case, movement, hand alignment, bezel, and serial number all indicate that Helmut Sinn also used parts from Jaeger and LeCoultre. Just like with the first series Sinn 103, which was sold by LeCoultre as reference E 2643.

In the case of a Sinn 4 ATM, the serial number begins with 442XXX, just like the Jaeger model, and is 6 digits long.

The case features a screw-down back, a silver dial, and three black subsidiary dials. There are 30-minute and 12-hour subsidiary dials at 3 and 6 o'clock, with a continuous seconds subsidiary dial at 9 o'clock. The black bezel is bidirectional and has a triangle with hour markers.

CASE BACK

Outer case back is signed with "ETANCHE 4 ATM INCABLOC STAINLESS STEEL" and the serial number.

Serial number 6 digits starting with 442 XXX.

- Case Diameter: 41 mm

- Overall Height: 14 mm

- Lug Width: 22 mm

MOVEMENT

VALJOUX 72

- Manual Wind Chronograph

- 60s, 30min, 12h

- Column Wheel

- Small Seconds

- 17 Jewels

- 18.000 A/H