Thanks, I wasn't expecting you to have all the answers! I think I muddied the waters by bringing up the El Primero. I meant it as an example of something more complex and expensive to service but not so obscure that a competent independent couldn't handle it. I was not considering the parts availability situation which I now see is a problem. Then it gets even more cloudy with Rolex in the mix because of their past use of the El Primero movement and apparently still producing parts for Zenith EP movements. It sounds like if independents
could get parts from Zenith that they would be doing so. So perhaps Zenith does not supply parts at all or they just don't produce vintage compatible EP components?
To leave the El Primero aside, I'm now curious what Zenith parts availability is like for independent watchmakers for other various movements. Whether they can source them from the wild easily enough or if Zenith provides parts to independents. The
2562PC in my watch wasn't produced for very long so I may have some problems ahead of me. I'll have to add all of this to my ever growing research list...
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