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Is this a confirmed franken?
I wouldn't be swapping that case for a '67 one!
Is it your only Speedmaster? If so it might be worth keeping an eye out for .012 movement over the next few months? Years? Either way, I'd get your correct hands and bezel on and wear the hell out of it!
What I would do, and this is just me because I like symmetry, is find a 105.012-66CB that has either had its case polished such that the facets are gone, or one that has a wrong or replaced case and make one really good CB and one average 145.012 out of the two.