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Sizing Crystal for Vintage Elgin Pocket Watch

jdrichard
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jdrichard Distinguished Member

jdrichard

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I just services this Elgin Pocket watch and need to give it a crystal. The photos show the inside and outside diameter. What size and shape would you recommend and how do I replace it (this would be a first PW Crystal replacement for me. 5291a19b2c914c94ee2a0ec0b2049bda.jpgdf421690b46ef341b95f4d6d626c2f46.jpgca36de1f5d5ce50cf5904bdaf3207b95.jpg23881af23a76f0645b3d19eb5603061e.jpg

oldhippy Distinguished Member

oldhippy

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Use the other side of your micrometer, that way you can get right inside the bezel and measure up as far as you can go to the shoulders of the bezel, measure from say 12 to 6 or 9 to 3.

Here is a video I found to help you.

 

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jdrichard Distinguished Member

jdrichard

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Use the other side of your micrometer, that way you can get right inside the bezel and measure up as far as you can go to the shoulders of the bezel, measure from say 12 to 6 or 9 to 3.

Here is a video I found to help you.

 

Good video, thanks

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vinn3 Distinguished Member

vinn3

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vernier calipers AND special  micrometers  are  required to order an  after-market  crystals.  original pocket  watch crystals may be the same.  so that the  crystal is held as a  "press fit".  polease correct me if i am wrong. the  test is try to turn it in the case  ( wrist or pocket watch).   Vinn

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oldhippy Distinguished Member

oldhippy

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A  vernier gauge is all you need. Glass crystals would be a press fit that is the only way to fit them because there is no give in glass. Sometimes a little cement would be added. You try press fitting one of those very thin glasses into a bezel your lucky if it doesn't crack.   

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