how can I save this crown

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Kwijibo

·Apr 12, 2016

Hi fellows,

As I said before, I'm servicing a vintage SM300. Of course the stem was broken due to some rust. I'm willing to save that crown because it's unusual. See the narrow logo. Of course I could replace it but it won't be originaL I think that you undestand me you geeks!
There's a tiny part left out of the stem. really small and rusty. What do you suggest. I thought of 2 things. Drilling with a 0,5 mm drill or try Vissin.

 

U

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ulackfocus

·Apr 12, 2016

Kwijibo

how can I save this crown

Religion jokes aside, we need professional advice. Let me put up the Bat Signal: @Archer! Can you give a tip Al?

 

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VetPsychWars

·Apr 12, 2016

Since the stem is ferrous and the crown is not, you might burn it out with an EDM. Well, not you (nor me!) but an expert.

Tom

 

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sky21

·Apr 12, 2016

I agree you should try to save the original crown, but calling everyone geeks might not get you a lot of help.

 

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arkstfan

·Apr 12, 2016

sky21

I agree you should try to save the original crown, but calling everyone geeks might not get you a lot of help.

Pretty much anyone capable of giving a correct answer would happily answer to geek.

 

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RawArcher

·Apr 12, 2016

U ulackfocus

Religion jokes aside, we need professional advice. Let me put up the Bat Signal: @Archer! Can you give a tip Al?

Thought you were putting religion jokes aside? 😜

 

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Pvt-Public

·Apr 12, 2016

Could the stem be dissolved with an alum solution?

 

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Archer

·Apr 13, 2016·Omega Qualified Watchmaker

Kwijibo

What do you suggest. I thought of 2 things. Drilling with a 0,5 mm drill or try Vissin.

You can pay Bergeon for Vissin if you like, but alum from the spice aisle at the grocery store is a lot cheaper...

 

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Joe K.

·Apr 13, 2016·Curious about this text thingy below his avatar

VetPsychWars

Since the stem is ferrous and the crown is not, you might burn it out with an EDM. Well, not you (nor me!) but an expert.

Tom

 

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Horlogerie

·Apr 13, 2016

Place and cover completely in a small bowl of white vinegar, cover to prevent evaporation, come back in a week...