Pretty obscure topic, hunh?
First here is a fairly standard Kenosha Vito with a screw-in pearl and decorative leaf-shaped cutouts:
Next up is what I am calling a Pre-Yamaha Vito with a push-through bumper felt and triangular-ish cut-outs:
Next, a made-in-France Vito Duke with a screw adjustment bumper and leaf-shaped cutouts:
And finally, a Vito Model 35 with a screw-in pearl and triangular cutouts: