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Seiko crystals 285V21GN 285V17GCAF 285V23GCAF similarities and differences


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Hi, I did some research and decided to change the 285V21GN flat faced crystal on my Seiko Elnix 0702-6010 for a faceted style. I ordered both 285V17GCAF and 285V23GCAF to see which I liked best. I figured that they would have a good chance of fitting as they all use the same glass gasket (EZ2718B). I found that the V17 was a straight swap with the V21 with identical glass frame dimensions. The V23 frame however had the same diameters of the various frame sections but the thickness B and C were different. The portion A that the gasket fits to was the same. If I had tried to use it on the Elnix then the bezel would not have pushed down fully. Photos and dimensions posted for future reference.

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Edited by steve1811uk
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