1980 Western Auto logo?
I know I say 1970 here, but I’m beginning to think that Brother switched the JP-1 to black keys from white and lost the paper rest and metal carriage shell sometime in the late 70’s. If true, it means we would be able to figure out what decade (roughly) a JP-1 was made in by the color of it’s keys and if it has a paper rest or not. If so, this would be a 1980 machine.
EDIT: further research confirms this is a 1980 machine. Compare Western Auto logos from ads from 1970 and 1980:
Wire Loop paper rest & White keys = early-mid 60’s
Straight bar paper rest on spring & White keys = mid 60’s-early/mid 70’s
No paper rest & Black keys = mid/late 70’s-early/mid 80’s