Age of SEARS furnace

Any know the age of this SEARS furnace? All I could find was the model # 76382. The AC is also a SEARS product -Ser# 32376 369 - MOD# 816221. I think it is a 1976.

Thanks!!

Only number that would make sense 76, what year was the home?

1952

Sears has used so many different vendors to make their products over the years, do you have a link, Buck? Thanks.

For instance, in one book this model # 867.763834 is a 75,000 1991 model but I don’t find your exact model number.