We're pulling for you, BC, so please go get this. Not many brownies show up up here in Canada.
I wouldn't even hesitate if it's only 20 minutes away. Heck, an hour away, and I'd be going ….
Also by 1979 most, if not all kettles were supplied with a rolled edge pan.
@SixZeroFour , my "A" code blackie does not have a rolled edge pan.
My guess is that this brownie is an A or B code.