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You are here: Latest questions & reviews > Omega reviews > Omega Speedmaster '57 Watch 41.5mm Co-Axial Chronograph 331.12.42.51.03.001

Omega Speedmaster '57 Watch 41.5mm Co-Axial Chronograph 331.12.42.51.03.001 questions & reviews

Question or review:

What does the custom version of the Cal.9300 movement mean? Is it a 7750 movement with an added decorative cover plate?

Reply: Aside from modifications to the cover plate, there are also some minor structural changes that are closer to the original movement.

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