A first for me, never had a set like these before.
Band construction had a double fold on the end that the remove able ear attaches. Ears also have PB casted into them.
Has MFG stamp that is diamond shaped with PB in the center. Patent dates 9-12-16 and 9-25-23. Also has reinforcements stamped in band, see high lighted area, in five places around the surface
Parks & Bohne brand.
They sued and settled with Ford when Ford came out with their script demountable bands!
(Message edited by Dan_Treace on July 01, 2016)
Oops, had to go back and look at older post made on this topic. They didn't sue and settle, it was Ford that sought court favor, and had the P&B patent declared void!
No royalty to pay that way, so Ford came out with their own styles!
Thanks Dan even and ad!