I recently purchased a New Omega Speedmaster reference 311.30.42.30.01.005 and immediately noticed that 'Professional Moonwatch' has been engraved on the caseback. Please see the photo. Just wondering if anyone can shed light on this as I cannot find any photos or information on this change?

 

I believe the newer case back started trickling out about 6 months ago.

Of course the first google hit for “new Speedmaster caseback” yields this link...

https://omegaforums.net/threads/new-caseback-on-the-speedmaster-professionals.55557/

 

Thanks for the reply

 

Good morning, afternoon or evening.
My latest has the new case back as well. Serial #7875xxxx.

Have fun
-kfw