MITKA

Service/restoration Helvetia calibre 75A

P1140447Here is a great Art Deco Helvetia from the 30’s. It is not running and the case looks a little tatty. The movement however looks to be in very good condition.

P1150842

The  dial is not bad, but I have a very nice NOS dial that will take it’s place.

P1150843

Helvetia were very early to introduce their own shock protection system. On the photo you can see the lower jewel setting is fitted in a flexible steel arm allowing it to move during a shock.

P1150844

I take the movement apart.

P1150854

I have cleaned the movement and it is ready to be put back together.

P1150856

I fit a new mainspring.

P1150855

I doubt these parts where Epilam treated when new;)

P1150858

I fit the shock protection system and see that the balance moves freely.

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I put the gear train in place.

P1150864

The movement is very nicely made with 3 individual train bridges.

P1150865

Movement back together and ticking.

P1150867

There is a large beat error so I adjust the collet and try again.

P1150869

Movement on the timegraph.

P1150868

That’s excellent for such an old watch!

P1150870

As mentioned earlier I had a very nice NOS dial waiting for this watch. The two toned silver finish goes very well with the blued hands!

P1150872

I had the chrome case restored and it looks superb.

I have ordered an open end leather strap, but a Nato strap does the job until it arrives.

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