Chief Cam covers 85692 & 85040 what years are they??

[blueyes]

Hey Guys... Digging through some stuff for the upcoming Yankee meet.
I have part number 85692 and a 85040 cam cover and am wondering what year they are for???

Seems I've had more than a few 85691 covers for like 36-37 but I don't see these two numbers in parts books or at least ones I have lol...

THANKS.....