Yep, and evidently the seller didn't know what it was either, as he put in the description, "It has the letter B in a circle on it." That's the Burroughs logo.
The buyer of that board always snipes at the very last second on the auctions I've seen. I was thinking about going for it but don't have a clue as to what sort of switches the board has and being it was quite heavy didn't want to pay that much for the shipping only to find out it used crappy switches.
Anyone know what switches were used in the old Wangs and Burroughs?