This is John’s Seamaster 300. A fairly rare and sought-after beast, and it has the calibre 552 automatic movement in it. The crystal is quite scratched, and the dial has seen better days.
Time to see what lurks inside …
This does not bode well. Water has come in, and there is a fair amount of rust.
What’s left of the case back gasket…
I’m glad that John agrees to leave the dial as it is. I wouldn’t have liked to see it restored, as it’s in good enough condition, and, most of all, original.
The bottom plate is quite rusty as well, and we decide that John will look for a replacement movement on eBay.
And he strikes lucky, and finds a pretty good 552 on eBay – not a fleck of rust!
The bottom plate looks great, too, apart from the broken set lever spring.
Huge amounts of flaky dirt in the movement.
All cleans up well, and I’m ready to put the movement back together.
The usual new mainspring.
Back together and ticking. Notice that the regulator screw of the donor movement is broken off, so I will get the remaining bit out, and put the one from the original movement in.
And we have a regulator screw again.
Cased, and with a new case back gasket, we’re ready for a final adjustment.
That looks nice.
Now, aren’t you happy we left the dial?