Post by siralan on Mar 4, 2017 7:22:25 GMT -8
My latest purchases from Yahoo Japan included a King Seiko 5625-7120. From the listing I could see it was in cosmetically very good condition, which for me meant:
I could see from the listing that it was going to need a new crystal, but figured that shouldn't be a problem. It turned out (when I researched it) that the crystal is a bonded one, and fairly rare - part number 300V16GNS0.
Once I'd won the auction, I started looking for a crystal, but quickly drew a blank - so I placed a WTB advert and thankfully was contacted by someone who had one. Yay!!
Yesterday evening I stripped the case down and cleaned every component. There was a very small amount of rust / pitting damage in the bezel recess, but nothing too serious. The plan for the weekend was to service the movement.
Here's the case (you can see the pitting around 11pm)
and the bezel, crystal gasket, movement holding spring and a ring that the gasket sits on
and the caseback
the case has an interesting hidden feature between the lower lugs
that's not a Helium escape valve!!
There was a small amount of rust around the crown tube, but I cleaned this up carefully
Here's the crown and stem
and here's the all important movement
wow!!!
I removed the autowind rotor
and then removed the hands
and then the dial to reveal
then I fully wound the mainspring and took a timegrapher reading
and then I stopped and considered what I'd got:
And I decided that for now, this movement can wait before I do any more work on it, other than adjust the rate.
It wasn't immediately clear how I do this, but I quickly realised that there is a 'screw' on the side of the movement
which when turned, provides very fine adjustment of the rate lever.
And, I guess that that screw on the caseback provides access to this without removing the movement from the case - how cool is that?
So, having adjusted the rate, I set about putting it back together. Here's the movement re-cased
with the ring that the gasket sits on in place
and the crystal gasket cleaned and in place
here's the new and old crystals
the bezel has a bevel on the underside to facilitate easy removal - its important on this case type that when the bezel is pressed back in place that the bevel is located between either lug
and here it is on the wrist
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this has turned out as an 11/10 watch and I love it. The movement is an absolute beauty and is running very very nicely.
Maybe at some point I'll service it, but given (from the black pen marks visible on the inner caseback) it has previously been serviced it can clearly wait.
- good dial and hands
- good medallion (I've seen some with very poor medallions - I wanted a good one as this was going to be my first)
- good case (no major dings or damage)
I could see from the listing that it was going to need a new crystal, but figured that shouldn't be a problem. It turned out (when I researched it) that the crystal is a bonded one, and fairly rare - part number 300V16GNS0.
Once I'd won the auction, I started looking for a crystal, but quickly drew a blank - so I placed a WTB advert and thankfully was contacted by someone who had one. Yay!!
Yesterday evening I stripped the case down and cleaned every component. There was a very small amount of rust / pitting damage in the bezel recess, but nothing too serious. The plan for the weekend was to service the movement.
Here's the case (you can see the pitting around 11pm)
and the bezel, crystal gasket, movement holding spring and a ring that the gasket sits on
and the caseback
the case has an interesting hidden feature between the lower lugs
that's not a Helium escape valve!!
There was a small amount of rust around the crown tube, but I cleaned this up carefully
Here's the crown and stem
and here's the all important movement
wow!!!
I removed the autowind rotor
and then removed the hands
and then the dial to reveal
then I fully wound the mainspring and took a timegrapher reading
and then I stopped and considered what I'd got:
- A movement that looks VERY clean
- A movement that is running very well (super stable and a good, but not great amplitude)
- A movement I've not worked on before
And I decided that for now, this movement can wait before I do any more work on it, other than adjust the rate.
It wasn't immediately clear how I do this, but I quickly realised that there is a 'screw' on the side of the movement
which when turned, provides very fine adjustment of the rate lever.
And, I guess that that screw on the caseback provides access to this without removing the movement from the case - how cool is that?
So, having adjusted the rate, I set about putting it back together. Here's the movement re-cased
with the ring that the gasket sits on in place
and the crystal gasket cleaned and in place
here's the new and old crystals
the bezel has a bevel on the underside to facilitate easy removal - its important on this case type that when the bezel is pressed back in place that the bevel is located between either lug
and here it is on the wrist
this has turned out as an 11/10 watch and I love it. The movement is an absolute beauty and is running very very nicely.
Maybe at some point I'll service it, but given (from the black pen marks visible on the inner caseback) it has previously been serviced it can clearly wait.
a KS or GS is top of my wish list.
