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: According to the official OMEGA website, the
: 3752 has Omega 1863 movement while the 3750
: has the Omega 1861.
: Need one of the Speedmaster experts like Chuck
: to say what is the difference between those
: two.
The difference between those two is one plastic part in the 1861 being replaced by the (original) metal part in the 1863 and the 1863 being more attractively finished for use with the clear display back. I forget exactly which is the plastic part but it was used in the 1861 because it is self-lubricating. Omega did not want a plastic part visible through the clear display back so they went back to the metal part.
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