Black trapeze open-front robe/jacket with gold lining and topstitched rows?

Hi, y'all. I'm sort of at a loss with this one. Is it a robe with a specific purpose/use/cultural history? (It reminds me of a choir robe) Or just a gorgeous jacket? And, when/where is it from?

Not sure why, but something about it makes me feel like I should post it here to try to get some more info.

Things to note:
--has pockets
--open front
--very stiff outer fabric
--see photos for topstitched and interior construction details!


Any information/ideas are much appreciated! Thanks so much!

 

1950s clutch coat

 

It's actually not moire at all, just the faille playing tricks on the camera.

Thank you for your help!

 

Thanks for the help! I probably would have just thought "swing coat" if not for the color combo & rows of top stitching, which make it seem more choir robe-like. =D