Quote Originally Posted by David Dubh View Post
it’s a regulation doublet
Cheers David - could be, that was first thought and difficult to tell from the photos - but doesn't look like a lot to play with in terms of the lapel, and no notches (which I would expect) - plus the button configuration is a bit irregular for a regulation doublet (pun 1/2 intended).

I am almost curious enough to buy it just to find out!!