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Technical help needed - Early Cal.11 GMT movement

As we are all aware the first of the automatic Autavia GMT's had the 1-24 bezel in place. These earlier watches ran a modified Cal.11 movement rather than the later Cal.14 versions.

I have a movement being serviced at the moment & unfortunately the watchmaker has come up against a problem. It seems that the hour wheel is missing a tooth and needs replacement.

The part number for a cal 12 (non GMT) is 2558. I do not have part numbers for the GMT so I don't know if it uses the same hour wheel (the 24 hour wheel fits on top).
I would like to find out if the Cal.11GMT movement & a standard Cal.12 movement can use the same part. The watchmaker does not have another standard part available at the moment to compare similarities/differences.

Any and all help appreciated - Darren

Messages In This Thread

Technical help needed - Early Cal.11 GMT movement
Photo comparison of the 2 different parts & another question
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