Case should be French as movement bears an "M". Signature and other details closely resemble those found on 5415 dials that are seemingly correct. Not a 13ZN that attracts me.

 

Case and movement serial are matching too.

 

If the papers come back with France as the country of destination then those things begin to line up. The outer track and the subdials are identical to several well known 5415s. The hour numbers are not identical. I can check my 5415 to see if my dial says Swiss on it

 

Agreed. Case serial number could have been added by anyone at any point.

 

This is better than watching C.S.I

 

Just to clarify, are you implying that the similarity between the "Longines" marking on the case-back and the logo from 1900 suggest that the serial number was likely applied in period?

 

The bottom box has the "1900 type" logo in combination with 10 Grand Prix,
so there must be some overlap on the use.

 

I’m suggesting that the stamp inside the case back is unusual for the late 1940s, but if the watch was cased in France that may have been the only Longines stamp they had on hand. Anyone email Longines Brand Heritage the serial number yet or should we shoot off an email to them?

 

The stamp puzzles me. Below is another one from the late 1940's. Also below, it appears on a steel case bound for China in 1939.

 

What does the front look like? I’d love to see a Chinese market watch for that era!!!

 

As you will note, a cursive logo is quite unusual for the time.

 

ca. 1947 (7349362)

 

Nice.... and interesting. Thanks for showing! Is it yours?

 

Not mine. The movement has an interesting marking so I saved the images.

 

Redial or not?

 

Redial.

 

I thought so..Thanks

 

Seriously?! I am not a Longines expert... could you tell us why this is a redial? I am very curious about it!

 

...because the edges of the subdials are rounded and the character style of "Longines" and "Anti Magnetique" is not correct.