This is is a  4 1/2" square lens board for the 5x7 Eastman (KODAK) 2D Camera .backside is flat black,undrilled. Finiished brown on the front . Also available unfinished. Material is solid core furniture grade material. shipping $6.95

It is drilled a recessed at the back to accommodate a #1 Copal lens and shutter.

Photo shows it as a blank board but this is a drilled #1 board