1953 date code.
Aug, 1945 date code
Sure one was JAN and accepted just as WWII was ending and the other was produced much later when the economy was booming but the picture of them both together is what makes me laugh.
I always thought it was odd that they would package a tube the size of the 388A in a box better suited for a 284D and when an auction came up for 4 of the 388A's + 3 872's I figured I'd put in my traditional $37.77 snipe. I won it for 22.27 only to later find I had actually outbid that cheapskate we know around these parts as Jeffrey.... sorry bro.... they are yours.