Classicwatch Vintage Watches

Greetings!

Please help identify this JLC. Apparently it is from the 50s-60s, could anyone confirm that?
Is there any way to tell if the dial was refinished?
Also, was it common practice for JLC to use "LeCoultre" signed casebacks?

Details:
Dimensions 33x26mm excluding crown
Lug width 20mm

On the caseback (from the outside), there are two lines of numbers: "981582" on the top, and "V877" on the bottom.

Any help would be greatly appreciated. Thanks in advance!

Vince

"LeCoultre" signed back on vintage JLC is normal. I'm a bit surprised it doesn't indicate what the case is made of. Can you post a photo of the back from the outside?

Thank you very much for the response.
Does the caseback condition look too pristine for its age to be an original?
I've also added a photo of the crown as well as a better shot of the face.

Thank you once again for your time!