This is probably a ref 4126 , movement V453 from the early forties with a stainless case, but you could look for hallmarks. Yes the movement ticks loudly but it's a terrific movement. I have the same case in stainless with an arabic dial, not sure your dial is original. The sub second hand broken off?
They furnished these stainless cases with white gold crowns, yours looks to be a replacement. The Vacheron concierge is very helpful if you'd like to verify any info.
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