oldtools Posted November 19, 2019 Report Share Posted November 19, 2019 Interesting article about the El Primero movement and the man who was supposed to destroy the tooling. https://www.hodinkee.com/articles/charles-vermot-the-man-who-saved-the-el-primero-and-possibly-zenith In the article it says Rolex used the El Primero to replace the Valjoux 72 in the Daytona and that it needed no alterations to fit in the case. I was wondering if the chronograph dials on the El Primero in the same location as the V72? Is it possible to build a 6263 and use an El Primero movement? 1 Quote Link to comment Share on other sites More sharing options...
tomhorn Posted November 20, 2019 Report Share Posted November 20, 2019 (edited) The El Premero based movement (Rolex 4030) went in the later Daytonas (16520), not the 6263. Edited November 20, 2019 by tomhorn Quote Link to comment Share on other sites More sharing options...
oldtools Posted November 21, 2019 Author Report Share Posted November 21, 2019 Thank you. So the V72 movement dials are in compatible with the El Primero? Quote Link to comment Share on other sites More sharing options...
tomhorn Posted November 22, 2019 Report Share Posted November 22, 2019 That would be correct. Different subdial spacing. 1 Quote Link to comment Share on other sites More sharing options...
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