Help Identifying A Likely 40s French Jacket

[DML]

Hi! 

 

I don't know if anyone can help, but I'm looking to date this jacket and value it too. I've looked all over the internet and have found others but they conflict with eras and when/what they were used for. 

 

If anyone can help, that'd be great! I don't know anything about military clothing but there's a stamp inside saying "ETS Delesalle Armentieres" which I'm assuming is a makers mark. "Armentieres" seems to be a commune in France and "ETS Delesalle" looks to be the name of a manufacturer (the latter part being a Surname). The only thing I can see is that they had clothing or fabric factories in the 20s from seeing an old French article online. I don't know if the "23" is a sizing, batch number or what it relates to. The back of the buttons are stamped "T W&W Paris" as well.

 

Most online listings have this down as a 40s French battledress blouse jacket, but that could just be an assumption on their part as the writing/manufacturer is French. I've heard others say it's likely a post war/late 40s Belgian jacket (I don't know if the French would have supplied the Belgians as they're close by or if this is unlikely).

 

The others I've seen all look untouched so I'm not sure if they're surplus or just well looked after! Any info would be gratefully received, thanks!

 

Link to photos here: https://we.tl/t-wC0P7w6KNS