Not to worry, these are sold seperately. 7X17 Folmer guys, bet you thought you'd never see an extra factory board for your banquet camera.
It has been boogered but you were going to modify it for your Sinar boards anyways. Perfect! Don't miss this one, they're like hens teeth. One per camera is the norm.
The other board is an ordinary Agfa lens board. Fits a 5 1/4 square opening. Has a 2 1/8" hole bored.
I'll pay the shipping on either one in USA. Folmer board, $27 Agfa board $14 PayPal OK