Age on GE Furnace

Model #BLU108E936B1
SER# 562354
Thanks for any help!

It looks like the first digit of the serial number might be missing. It should be a letter. However, the numeral 5 could be the letter S. If it is, then 1980. Otherwise, I don’t know.

Thanks for the help RR!

Preston’s says 1980.
108,000 btu

Thanks for the confirmation, Chris.