about longines 30ch

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Dear ALL
how about this watch? is the dial original?
i find it on shop, it needs $3700 the price is good or not?

thank you!

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The dial has been poorly refinished. Case is intriguing, as well. I do not recall encountering this reference before.
 
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A mess to be sure.
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A little search in www shows Ref. 8488-1 is an Ultronic-type from the 70s.