Those look like hippie wide third party strap from the 70's. Whenever I got them from a camera I bought I trashed them. Original straps that came with the camera were usually 1/2 inch wide and made of black leather but sometimes canvas.
I'm gonna piggyback on this thread and say I wish I could find some vintage style straps that would actually fit my Retina IIc and Yashica-Mat. Everything is either too wide at the connection end or it just fits and is so tight there is really no movement of the strap so it's always bent and in the way. Right now I have some key rings on the Retina half-case lugs, but I'm not sure I trust them after all these years. The rings don't fit well on the actual camera lugs. The Yashica is the same way. Any suggestions?
There were two genuine Olympus straps that I like.
One was a plain Black canvas strap with the name "OLYMPUS" in blue lettering.
The other (my favorite) was a wide canvas strap that was tan at the outer edges with a blue stripe down the middle and the name "OLYMPUS" in white letters inside the blue stripe. The ends of the strap are in brown leather with metal clasps and black nylon loops to attach to the camera. You can find the tan and blue version on the big auction site from time to time, but make sure that the nylon loops are included.
"She's always out making pictures, She's always out making scenes.
She's always out the window, When it comes to making Dreams.
It's all mixed up, It's all mixed up, It's all mixed up."