Omega Seamaster 120

I thought I’d feature this example as it’s one of the lesser trumpeted Seamasters that Omega produced but just as good looking and collectable as it’s 300 & 600 stablemates, in fact with it’s slimmer case it’s more at home with a formal business suit in my opinion. This one arrived for a service and a new crystal along with a relume of the bezel pip.

Omega Seamaster 120

The caseback is the screw down type with Omegas hippocampus logo featured in the centre.

Omega Seamaster 120

The first issue as I removed the caseback was the gasket had reverted to a soft tar like sticky mess, the crown seal was the same.

Omega Seamaster 120

Let’s have a closer look at that gunk. I’ve opened a few watches like this in the past and the residue is an absolute pig to clean up, you have to to remove the movement before you do anything else as it will stick to anything and everything! Once the movement’s out you’re then faced with the laborious process of picking the remains out of the case groove with pegwood and using solvent to clean up the residue. Yuck!

Omega Seamaster 120

The movement is now out of the case in this shot, note a dollop of liquid gasket on the casing cushion, you have to be ever so careful not to get any on the dial 🙂

Omega Seamaster 120

After some considerable effort the case components end up shiny bright again.

Omega Seamaster 120

The watch is powered by Omegas calibre 601 movement, a manual wind 19,800bph beauty. The strip started with the dial side….

Omega Seamaster 120

Omega Seamaster 120

….and finished with the going train side.

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Once everything was cleaned and inspected it was put away until the new parts arrived.

Omega Seamaster 120

Once the parts were here the first job was to fit the new crystal.

Omega Seamaster 120

A new crown was in order as the seal had been destroyed in the original.

Omega Seamaster 120

The movement rebuild commenced with a new mainspring….

Omega Seamaster 120

Omega Seamaster 120

….and proceeded in an orderly fashion 🙂

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

The dial and handset were refitted…

Omega Seamaster 120

….the movement was recased….

Omega Seamaster 120

….and another one is completed! The serial dates this one to around 1968, it’s in cracking condition for a 48 year old 🙂

Omega Seamaster 120

Omega Seamaster 120

Omega Seamaster 120

 

3 comments

  1. Pingback: Anonymous
  2. HI, what a great job done on this SM120,i have one in good condition but for some reason the spring below the bezel has frozen and locked the bezel,do you know if that spring/band is still available from any where?Mine is the same watch as this 1967 vintage.

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  3. With the spring I’d just make a new one, however you’ll probably find it’s not the spring causing the problem it’s more likely to be dirt that’s locking things up. If you remove the bezel and clean everything, make sure the spring is flat then refit it all again should be OK.

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