Odd P&F Corbin lock and key Key info needed.

[fdew]

Hi, New kid here. I have a key operated electric switch that I need some info on. Most important I want to get a couple more keys made.

This is a porcelain case switch by H&H probably about 1920 or so. It is fitted with a P&F Corbin cylinder and key. The key is small (about the size of a modern pad lock key). It is cut for 3 pins. It is marked HH61 I would like to find out what blank it is. I am a mechanical designer so I am a bit anal. I have modeled the key in 3D CAD so I can tell any dimensions that would help ID it. also I have pictures of just the key

I collect antique electrical stuff and now that I know about these keyed switches I will be looking for more.

I don't want to ruin my welcome so I will start with just one picture. If anyone would like more, please let me know.

Thanks.