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Endlinks probably not original, I believe they came with non-numbered endlinks that are otherwise identical to #11s. I want to say this model was 1958 and earlier, but I’m not sure how early.
Bracelets weren’t sold pre-paired with watches so I suppose they could have been sold with any models where the endlinks fit (Seamasters and Connies of the era at least).
16links is quite short, could effect the value as well
There have been lots of these sold on ebay as well as this forum over the years and you will see quite a range in price depending on condition. Yours looks quite nice but used BOR are not usually all that expensive. $125-250, depending on the condition. The JB version you have is less common.