From research, for anyone who cares, I have found that front and rear brake pads are identical.
By dang, you're right, according to the new parts fiche at Sound Sound!
I looked at a post-crash reassembly picture (from my old 35mm camera) I had, which had a set of F1 forks on it. They have the calipers (round-ish type) that don't have all the pieces that the F2/3 front brake has, and their pads are round, not squared like yours.
Sorry for the mis-information!
I forgot about the geneology of that poor bike. It met a Chevy rear bumper at around 35 MPH, broke the lower triple and bent the forks. F2/3 forks weren't available at the local junkyard, and the rider didn't care how it was pieced back together. Later on it got swapped again to a GL front end with dual disks and Lester wheels on both ends, but I don't have a picture of that mod.
