SPECIFICATIONS
1. Windig . . . . . . . . . .manual and automatic winding with ball bearing device
2. Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28,800 (4.0 Hrz)
3. Daily rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10 to + 20 s/day
4. Power reserve minimum (full winding) . . . . . . . . . . . . . . . . . . . . . . . . .42 h
5. Power reserve after wearing the watch continiously
for 10...12 hours (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 h
6. Display system
a) Time
• Cal. 7750 . . . . . . . . . . . . . . . . . . .3 hands (hour, minute and sub-second)
• Cal. 7751 . . .
4 hands (hour, minute, sub-second and 24-hours sub-second)
b) Calendar
• Cal. 7750
Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .figure (figures)in window
Day . . . . . . . . . . . . . . . . .3 letters in abbreviatured form in the dial window
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