• It should be a "Japanese type". They have a rubber gasket on the pipe where the stem inserts which deals the pendant tube from water ingress. Unique to Japanese watches.

    If it's a cheap watch then just get anything that fits.

  • Thanks for your help!

    It was a £20 eBay punt I wore for a week then forgot about.
    It needs cleaning up, and the crown replacing, I'll have a go at sorting it and see where I am at.

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