Vintage UG bracelet with 21mm endlinks?

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Hello what UG watch model(s) would 21mm endlinks fit? They are unmarked, and on a UG Stainless Steel Made in USA bracelet. Obviously, they could be aftermarket, but it led me to wonder if any UG models use 21mm ends? Thanks in advance.
 
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good talk, guys 😉

best i can find, no UG came with 21mm lugs.