Information Required On Mystery Omega 501 Movement.

[Geo]

Hi guys, a few years back I purchased a new old stock replacement movement to fit into an old Seamaster. It certainly looks genuine and perfect, but there is no serial number on it.

Could someone please explain the absence of the number?

[bobm12]

Hi Geo,

 

Apart from this http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Omega_501 which I believe you've already seen, I came up with this http://watchguy.co.uk/service-omega-seamaster-calibre-501/  They have this pdf I downloaded here for your -- and other interested members convenience:

 

movement3.pdf

 

I hope it is of some help in your quest!

 

Cheers,

 

Bob

 

PS. I don't know if this one is of any help: http://www.chronomaddox.com/OmegaCaliberList.html

Edited January 11, 2015 by bobm12

[Geo]

Thanks for all of that Bob, but it doesn't answer my question. :-(

I'll file all the information though, because I hope to strip it and give it a service in the near future. :-)

[anilv]

The autowinding bridge could have been replaced by a new one sometime in the past..?

Anil

[jaycey]

Here;s my guess.

COSC spec movements have to have a serial number. If this is not one of the COSC spec 501's then that might be your answer.

[Geo]

The autowinding bridge could have been replaced by a new one sometime in the past..?

Anil

Thanks Anil.

It's a possibility, but the the colour of the plating matches perfectly and everything looks brand new.

[Geo]

Here;s my guess.

COSC spec movements have to have a serial number. If this is not one of the COSC spec 501's then that might be your answer.

Interesting Jaycey.

I thought all movements would have a serial number issued by Omega, even replacements.

[Mark]

Can't explain the absence of the number but it looks perfectly genuine to me.

[Geo]

Can't explain the absence of the number but it looks perfectly genuine to me.

It's a real mystery, but like you I am 100% certain it is original. It just oozes unblemished quality.

[Marc]

I hope I'm not violating forum rules by posting a link to another forum (Mark please remove as appropriate) but I don't know if this sheds any light.

It's an interesting article even if it doesn't. 

 

http://forums.timezone.com/index.php?t=tree&goto=4066647&rid=0

[Geo]

Thanks Marc, that was an interesting read and a mega project that the fellow carried out. It's certainly given me more food for thought.

The one thing that really confuses me, is I read a post on another Omega forum where a technician that worked for Omega said all movements were numbered. Maybe this one have been assembled from parts as your link suggests, but I may never know.