I found this strap on an old Felca Seascoper I found in a thrift shop. I'm not very familiar with the watch, but there is some information on the Internet (nice two crown super compressor, this particular one in dire need of service/restoration). The strap is odd. It fits the watch poorly, and I'm curious what it's originally from. I haven't found a watch it works with, partly due to the thickness of the plastic end piece. It's a pretty cool strap - I'm looking forward to wearing it if I can get anything to sit snugly! (After a thorough washing, it... it was pretty gross. ) It feels nylon, but two distinct layers sewn together. End pieces seem to be one piece, with strap sewn around - not spring bars. I'd have to rip the stitching to be sure, though.
The buckle logo:
The odd plastic end piece:
And with the watch I found it on - if you squint you'll see the strap is too small for the lugs:
Any pointers appreciated.