8X10 Focal Plane Shutter spring shaft???

Some years ago I purchased a box lot of view camera parts from an old world camera repair shop that had closed. An enquiry regarding 2D extension rail track had me retrieve this box and digging through it I found what looks like the spring shaft for a large focal plane shutter. The distance between the 2 round brass plates is 8 1/16 inch and the gear at the shaft end when turned is under spring tension. It appears to be unused and it looks like a large version of the Speed Graphic focal plane shutter spring shaft. Is this what this is and can any one use it?

That is indeed what it appears to be. Graflex made accessory focal plane shutters for 8X10 view cameras. One shows up for sale occasionally, though they're pretty scarce. The shutter fit onto the back of the camera and the camera's back fit onto the back of the shutter. No modification to the camera was necessary. Hold on to that roller, please. It's a very rare replacement part. If you don't have a use for it and would like to see it go to a good cause, leave me a PM and I will offer you some info.

Large focal plane shutter spring

Hi

I had sent you an earlier PM but perhaps it didn't reach you. Looking forward to receiving more info re this. Regards Simon

Simon, I received your message and responded. Maybe it didn't get through. I'll try again later.