Thread: 4 th hand on the dial
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ZAMIRZ ZAMIRZ is offline
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Join Date: May 2002
Location: SF Bay Area
Posts: 3,219
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That is a split second chronograph:

https://www.hodinkee.com/articles/a-detailed-survey-of-the-split-seconds-chronograph-and-its-cousins
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Amir

'83 911SC
Old 02-14-2018, 02:25 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #18 (permalink)