31 Jul '12, 7pm

A Vintage Watch Nerd's Critical Dissection Of The Rolex Daytona, Past To Present (Part 2/3): Rolex's reference 1...

Consider a chronograph mechanism as a separate subsystem, which, through a “clutch”, is coupled to the movement to power the chronograph’s indicators once activated. The most widely used is a “lateral clutch”, as was found on all prior movements used in Rolex’s chronograph watches. Lateral clutch-based chronographs work well in general, and are visually very appealing; however they have a couple significant disadvantages: 1. Loss of amplitude in the balance wheel’s oscillation when the chronograph is engaged, affecting timekeeping accuracy, and 2. Backlash. When the chronograph is either started or stopped, the chronograph seconds hand typically hops, or jumps, due to the imperfect, mis-aligned mating of the lateral clutch’s gear with the teeth of the movement’s driving gear. By design, the 4130’s vertically coupled approach enables absolutely precise starts and stops of t...

Full article: http://hodinkee.com/a-vintage-watch-nerds-critical-dissec...

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Part 2 of our critical dissection of the Rolex ...

hodinkee.com 31 Jul '12, 8pm

Consider a chronograph mechanism as a separate subsystem, which, through a “clutch”, is coupled to the movement to power t...

A Vintage Watch Nerd's Critical Dissection Of T...

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Hodinkee Post: A Vintage Watch Nerd's Critical ...

hodinkee.com 30 Jul '12, 8pm

Nearly 25 years after the introduction of the first self-winding Daytona, versions in stainless steel remain one of the mo...

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hodinkee.com 30 Jul '12, 8pm

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