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Hi, I've read that these movements the hands aren't interchangeable. But what about the day/date wheel? Are these interchangeable for all movements or not?
Like 7548 to 7549 or 6309? I'm talking only the day/date wheels.
I've search around but no answers.


Thanks, Dave.
 

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sharkfinDave said:
Hi, I've read that these movements the hands aren't interchangeable. But what about the day/date wheel? Are these interchangeable for all movements or not?
Like 7548 to 7549 or 6309? I'm talking only the day/date wheels.
I've search around but no answers.

Hi Dave,
Because the hand hole sizes are larger on the 7549, the day disc also has a larger hole in the center to accommodate the larger hour wheel pipe. Therefore it is a different day disc and incompatible with the 7548 or 6309. The date disc is the same, however between all three that you mentioned. Above information gleaned from Seiko parts guides.
 
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