IWC

chintu
505

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Thanks and one more...

That IWC makes the only perpetual where the year indicator is a "FULL 4 digit indicator " and it also throws in a century slide containing the centuries 22, 23 and 24. Hopefully our decendants will be able to still use the watch after their watchmaker sets the century slide after year 2199. AP, PP or VC donot have the year indicator on their perpetuals. The reduction ratio for the century digit to move one mm in the IWC perpetual is 6,000,000 :1 ( versus the largest gearwheel in the watch). In the year 2099 Dec 31st the only forum members that will have an event or slide show to show the century transition will be those that have an IWC perpetual... Exciting isn't it. 

The only watch that is more userfriendly is the UN GMT Perpetual because of the feature of "backward settable hands beyond the date line". UN still has only a two digit year indicator as does the JLC perpetual. But then UN's day, date and the  two-digits on year indicator dials are mostly out of alignment because of the way the discs behave in the watch. See the scans of UN perpetual and you will observe this mis-alignment.

Regards

narsi