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Last edited: 2014-02-06T05:40:50
Last edited: 2012-11-26T20:28:20
Last edited: 2013-12-30T08:21:23
Best regards,Jim"We are the other people, we are the other people...you're the other people too!" Frank Zappa
dzul Wrote:I will be sad when this series reaches its conclusion. It has been one of the highlights of my ongoing education about IWC PW's and timepiece evolution. Thanks for the team's effort in bringing information to all of us!
costi92 Wrote:There exists some really old IWC watches (1880s) marked "Half Chronometer" on the inner back. This is the explanation of Cellar in an old post:"First though, at the end of the 19th century, watches with precision lever escapements were referred to as "half-chronometer", when the equality of lever and chronometer escapements had been confirmed in observatory competitions. This term was primarily used in England: the term in Glashuette is "ankerchronometer" (lever chronometer) for pocket watches with lever escapements and especially large compensation balances, but it is not much better. Both terms do not make sense, because they are not logical: if the main characteristic of a chronometer is its precision, and the detent or detached detent escapements only has significance when it is responsible for such precision, then watches with lever escapement are full, and not half, chronometers, as soon as they reach that precision".
Last edited: 2013-04-16T00:36:32
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