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Discussion Starter #1
looking to mod my sbbn031 but its pretty tough to find parts out there, any tips or leads?

looking for different hands, crystal, bezel/insert.

on that note anyone know what the handset size is? wondering if hands that fit other models could also work on the sbbn031/33 tunas.
 

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Discussion Starter #3
Yes those hands fit. Hand size is seiko standard 90/150


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sweet, didn’t know the tuna shared the same hand size as the skx (well 0.5 off but I think that’s ok). Would make my parts search much easier. Thanks!

now to decide on what hands to get out of the near infinite options out there. Hmm..... going to be Tough
 

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I don't think that info is correct. I think the hour hand will not swap. The diameter of the hour hand is wider in a tuna.
 
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