This is a lensboard for a Baby Graphic or other 6X9 press camera. It
measures 2.5 inches square or 63.5mm X 63.5mm. The hole is 39mm in
diameter -- Copal 1 size. It's in good user condition, but has some
cosmetic flaws -- a little paint missing from the back edges and some
kind of "X" marks on the corners. A black Sharpie would fix the paint
issue. This lensboard is not dented or otherwise compromised in
function. It should pop right in to your camera.

http://cgi.ebay.com/ws/eBayISAPI.dll...m=330018374560