I am supposed to be ruthlessly hard-hearted with my stock, but I go all wishy-washy and hopelessly gooey when confronted with dual-tone suit slips of the late 1950s and more often than not bag them for my personal collection instead. Here's a very short tour of just three or four of 20+ in my collection... Emms
Ooh they are fabulous! We were discussing these on the private side recently, trying to remember what they are called. I think someone found an advert I'll try and post it here.
They don't have to be dual-tone to be suit slips, of course - here's a St Michael single tone number :
Oh, they are gorgeous! Yes, Suzanne @anothertimevintageapparel - what you were talking about, and I think one of them looks very similar to yours!