Isn't that a Sprint-badged rear derailer?

Had me thinking mid-1960's, together with the "hidden arm" SPRINT
chainwheel.
I'm pretty sure that all of the Sprint componentry was sourced from France, after being earlier branded Huret, AVA, Normandy, Ideal, etc.

Imagine having to teach Americans about friction-shifting back in the 1960's! I've done it many times. Yes, out on the road, and through the hills, lucky that we all survived!
I couldn't get my Sprint/Allvit real derailer to index (yes, I actually tried, but the actuation ratio was so very non-linear that I could shift at most between three cogs).
But I kept the 50-39t Sprint cranks (mine is a 1964 btw).