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are these authentic friends...thinking of buying a few in case my one breaks....

My speedy is 14501267

 

This is a later replacement part. The crystal is fitting your watch, but the white ring is not correct for this reference, as we've learned here:
https://omegaforums.net/threads/old-speedmaster-crystals.38681/

As far as I know are the rings changeable.

 

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i am a bit confused about the ring..... so this one also not correct?

Tx

 

so essentially the omega logo must be flat feet and have a black ring?

 

Black ring on 105.003 and everything after that. You may have a hard time finding one with the original logo. The newer logo is generally acceptable though as the crystal is a service item and they do wear out, Crack, etc.