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I don't normally post on SCWF (I loiter on WUS) but I thought that I should post this thread on here as it concerns a SCWF member.

Nearly 2 years ago my lovely wife bought me my (then) ultimate diver, a Seiko 7c46-7008 SQ Golden Tuna, for my 30th birthday. I got a decent deal on it as it had a hefty gash on the crystal, something I've lived comfortably with until recently. I finally found a NOS crystal on the bay that I promptly got for a steal. Then came the search for someone to fit it and after the horror stories that PSweeting had posted regarding his experiences with Seiko UK, there was no way it was going to them! On to my first thank you in this post - ChrisGalbraith76 (top guy) PM'd me and suggested that I got in touch with Duncan (Cannop), a WIS buddy of his who he said was some sort of Seiko servicing genius (that's me paraphrasing :)).

That brings me to the main thank you - Duncan is the man! He replied within an hour of me PM'ing him and I could tell straight away that 1. He knew exactly what he was talking about and 2. That our transaction was going to be nothing but EASY!

I posted the watch to him on the 17th, he received on the 18th and he messages me today to say that he had completed the work and that the Tuna would be back on my wrist tomorrow! That's a 5 day turnaround! He replaced the crystal, pressure tested to 100bar (passed :)); then ultrasonic cleaned and greased the bezel FOC.

Here's the PM I received earlier today:

cannop said:
Hi Matt,

I've now fitted the crystal and pressure tested the watch to 30bar, which it passed successfully you'll be pleased to hear!

Here's how it went, the shroud and bezel removed

The crystal locking ring removed

The old crystal and nylon slip ring removed

A windowless watch

The new crystal, slip ring and locking ring refitted

In the chamber for a leak test, up to pressure

Wait 15 minutes and submerge

Release the pressure and no stream of bubbles so it's fit for the 30bar test in the hydrostatic tester

In the chamber

Lid on and up to pressure

Wait a few minutes and look for a large pressure drop, the pressure always drops a little but that more due to the seals in my tester rather than the seals in your watch!

Out she comes

Onto the warming plate

Let it warm through then place a cold droplet of water on the crystal. If there was any moisture ingress the crystal would fog up where the cold spot is. Needless to say yours was fine.

While the pressure testing was going on I ultrasonically cleaned the bezel and shroud components. The bezel isn't loose like a lot of older tunas, it feels just right to me after cleaning and slicone greasing the o-ring - firm but not tight.

The watch reassembled

Without sounding like a one man Duncan fan club I just just wanted to post this thread to say thanks for making my beloved Tuna even more special. If you don't already know Duncan and need any work doing take this as an A* recommendation.

I'll post a live pic tomorrow when it's back on my wrist.


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