Nighthawk
| Joined: | Mon Dec 11th, 2006 |
| Location: | New Jersey USA |
| Posts: | 81 |
| Status: |
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Darned if I know, but you'll see all sorts of variations. 30 minutes is pretty common. I've got a Seiko kinetic chronograph that goes to 45 minutes. Then, there's the ever popular Valjoux 7750 automatic mechanical chronograph movement that has a 30 minute register and a 12 hour register. Every time the minute register times a complete 30 minutes twice, the hour register clicks to the next hour. I'm sure it has to do with how simple or complex the movement manufacturer wants to go with each calibre....
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