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I personally prefer traditional mechanical over SpringDrive

 

but that's me.  I like the SBGW031 as it looks like Seiko's version of a Calatrava from the 1950s (but with 21st Century manufacturing methods and build quality).  That last photo in your post shows its beauty.  Classic.


I even like the round case and lugs of the W031 over the tonneau case of the Y003.

Since you like both, why not hold off on the SBGW031 until you get to try on the SBGY003.  The W031 is a regular production piece and has been in the catalog for years so I don't think they'll discontinue it anytime soon.  Since the Y003 is a LE you will have limited time and pieces to go after.  Prioritize that one first IMO.

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