What kind of suit jacket is this?

[NorthernBloke]

Commonly seen in the thirties, three button but lower down on the jacket like a two button and the buttons are closer together, and usually combined with wingtip lapels, modern repro's usually only have two buttons or higher three button stance, thanks.

 

[Jon Crow]

Commonly seen in the thirties, three button but lower down on the jacket like a two button and the buttons are closer together, and usually combined with wingtip lapels, modern repro's usually only have two buttons or higher three button stance, thanks.
View attachment 761119

If it has a more rounded bottom it looks like a sack coat I have a Japanese made one in denim, but this is a classic sack coat yours isn't a good photo

 

[NorthernBloke]

possibly, though the buttons are lower down and closer together on the thirties pic

quite close button holes on one of the pics i posted on vintage caps too

 

[Mean Eyed Matt]

Close button placement is a fashion trend of the 1920s; apart from that, it's a perfectly normal suit jacket...

https://www.thefedoralounge.com/threads/1920s-suits.69703/

 

[NorthernBloke]

Nice, thanks. It's an interesting style what doesn't seem to have lasted long, makes sense for people to keep wearing this style who were not well off into the forties I also wear 40-50 year old tweed jackets and have a few flat caps from thirties to fifties, reproduction is well out of my means.