This beautiful Seamaster was sent in from Norway, and it’s in need of a service.
I like the hour hand on this one – reminds you of the modern Railmasters.
Let’s open it up and see …
No lack of dirt here, and the set lever screw is rusty. My client wants that replaced.
The set lever spring is broken, so we’ll need that as well. Also, the dial washer is missing, and one of the dial screws. I wonder where they ended up, as there is nothing in the case.
I start by taking the balance jewels out.
You can also see quite a bit of dirt in the jewel holes of the wheel bridge.
The broken off bit from the set lever spring.
Ready for the cleaning machine.
As usual, I start off with a new mainspring.
That looks a lot cleaner.
And we’re back ticking!
First, I get a beat error of 7.5ms.
After a couple of adjustments, I’m down to 1.5ms, and that’s where I will leave it. This watch has the beat error adjusted on the hairspring collet, and it won’t get much better if I try.
The new set lever screw doesn’t want to go into the set lever, and I notice that the first thread isn’t quite right, so I re-cut it in a die. Good thing I recently forked out for a tap and die set – which cost a small fortune.
The bottom plate with the new set lever spring.
The movement is cased.And we’re back in business. I very lightly cleaned the hands, but I don’t want to risk dislodging the luminous compound.