SINN 101 A

Case Screw-back model with black dial and two silver subdials. The 30- minute chronograph and permanent second subdials are positioned at 3 and 9 o’clock.

The black bezel is bidirectional with a silver triangle at 12 o’clock and show minute markings. The outer case back has 20 ATM 361-33 and the serial number stamped.

The movement is a Valjoux 7733 and is signed under the balance wheel.

Serial number 4 digits starting with 8XXX.

SINN 101 B

Case Screw-back model with black dial and two subdials. The 30- minute chronograph and permanent second subdials are positioned at 3 and 9 o’clock.

The black bezel is bidirectional with a silver triangle at 12 o’clock and show minute markings. The outer case back has 20 ATM 361-33 and the serial number stamped.

The movement is a Valjoux 7733 and is signed under the balance wheel.

Serial number 4 digits starting with 8XXX.

CASE BACK

The outer case back is signed with 20 ATM, 361-33, and a serial number. The movement is a Valjoux 7733 and is signed beneath the balance wheel.

Serial number is four digits starting with 8XXX.

MOVEMENT

VALJOUX 7733

- Manual Winding

- Chronograph 60s, 30min

- Small Seconds

- 17 Jewels

- Cam Lever Movement

- 18,000 A/h