I'm sure I've seen that - or something very like it,m before,..........but what it was has gone, (it's me age you know ) .......I'm thinking some sort of winding tool, ???????????? possibly sewing, knitting, spinning or cloth making?
Thanks for the follow up! Now the funky part is that 10 years from now I'll see oe of these things somewhere and I'll say "That is a safe combination lock accuracy handle!" and everyone will think I'm a genius, instead of someone who was screwing around on the internet at midnight when he should be sleeping.
I'm filing that in my bin of useless tools I may construct and use for a different purpose at a later date.
Only reason I can think of for a device like that is applying force to a wheel pack that will probably shear the key and cause a really expensivce repair.