What lensboard size hole for 50's Compur shutter 2-X

[6x6TLL]

Hi,

I bought a used lens with a shutter I'm not familiar with.

It's a Compur shutter, as far as I can tell one of 3 in the same series: Compur 2-X 5/I; 5/II; or 6/II (type # CN-1408-012/013/015).

The lens is a Schneider Tele-Xenar 270mm f5.5.

Pic attached.

Anyone know what size lens board hole this shutter calls for?

Thanks!

228753228754

[BrianShaw]

Remove the retaining ring. Measure the inside diameter.

[6x6TLL]

Inside diameter is 49mm.

[Keith Pitman]

The attached chart was formerly on SK Grimes website. I suspect you have a Compeer #2 shutter.

[BrianShaw]

A 2 inch hole should suffice.

[6x6TLL]

Thanks, I'll see if I can find or make one.