Zenith Cal: 12''' NVSI, Complete movement

Example movement: Zenit 18.5''' NVSI, number: 2 339 026 (aprox: 1920), 16 jewels, excenter regulator.

Technical data: Zenith cal: 12''' NVSI

• 15/16 jewels, manual wind, sub second.
• Size: 12'''  27.25 mm.
• H: = 4.25 mm.
• N: = 18.000 A/h.
• Power reserve: -- h.
• Mainspring:

Versions:

• 12''' NVSI: open face caliber.
• 12''' NVSI: hunter caliber.
• 12-1 NVSI: open face caliber.
• 12-2 NVSI: hunter caliber.
• 12-4: wristwatch caliber.