Ed White Speedmaster movement question

carney610 · Oct 19, 2023

Hello everyone! I've recently come into possession of a Speedmaster. I took it to get serviced and I looked at the movement. Everything appeared to be in order (from what I could see as an amateur just comparing my watch to internet pictures). However, I noticed that the number by the OMEGA symbol read '320' instead of '321'. Is this just a case of certain parts being interchangeable between the two movements? Also, how will this impact any resale value? I'm not necessarily in a rush to sell it, but I'd like to know what I should expect.

Thanks in advance.

PS - Any strap suggestions are welcome!

Dan S · Oct 19, 2023

That's a pretty watch, welcome to the forum. Can you post the first few digits of the serial, or a photo that shows them more clearly. And the inside of the caseback.

Usually I see the cal 320 in other chronographs, like Seamasters. I assume the hour recorder works properly on your watch. 😀

carney610 · Oct 19, 2023

Dan S
That's a pretty watch, welcome to the forum. Can you post the first few digits of the serial, or a photo that shows them more clearly. And the inside of the caseback.

Usually I see the cal 320 in other chronographs, like Seamasters. I assume the hour recorder works properly on your watch.

Thanks! To be honest, I haven't tested the hour recorder. So I guess I'm assuming as well.

Here's a couple more I took before the watchmaker put the caseback back on.