Minerva 13-20
Data: Minerva cal: 13/20
- 17 jewels, manual wind chronograph, 60 s, 30 min counter.
- Size: 13''' 28,90 mm.
- H: = 6,40 mm.
- N: = 18000.
- Power reserve: -- h.
- Main spring: 1.50 x 11 - 0.13 - 350
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