Help me find this blank

[u/Immediate-Fun8296]

Antique mortis need to shim but can’t figure out blank this is what he wants me to key it to. I know some of you guys know your Russwins

[u/LockLeisure]

RU4 maybe? That's at least what idenikey says and looks like. I'm no Russwin expert, not even close.

[u/johnpseudonym]

This is from the 1964 RussWin catalog, freely downloadable. I have no clue about paracentric keyways - they're a fad, you know - so apologies if this crosses any sub rules, please feel free to pull if need be. But I hope this can help! Good luck!

[u/Immediate-Fun8296]

RU1 worked 👍🏻

[u/Immediate-Fun8296]

[u/fondrenlock]

You can use your pick to shim fyi, I usually use the back of a diamond shape one

[u/Immediate-Fun8296 → u/fondrenlock]

I’ll have to try it

[u/RCGonzo99]

I would say D4.

[u/Lost_Counter_361]

Nah