I love your subdued way of saying you have a Double Ring!Gillette Safety Razor 1905
The AutoStrop razors were popular in Japan, so these blades were made for them. Due to the pattern, they only fit one way, so if you have trouble flip it over. Some razors need a bit of the lettering snipped off to fit well.Wow! I did not know that these Feather blades were compatible with Valet AutoStrop razors. I've only used my AutoStrop razor once, and it was with a vintage AutoStrop blade. Let's just say that was a vintage experience . Once my GRUYERE resupply window opens, maybe I'll buy a few of these Feathers.