Age of Luxaire Furnaces

I want to make sure that I have the right age of a Luxaire furnace. Which part of the serial number is the age?

Fraser, Johnston and Luxaire were purchased by York in 1980.

York recently changed their serial nomenclature, so the old date sheets will not work in decoding anything manufactured after 2005.
YORK (Borg-Warner) (Unitary) Third letter in Serial Number

**A 1971 B 1972 C – D – E – F –(G 1977) H – J – K – L – M – N – (P 1984) **
R 1985 S 1986 T – V – W – X – (Y 1991)
A 1992 B 1993 C – D – E – F – G – H – J – K – L – M – N – (P 2005)

Since 2005 models have a letter-number-letter-number configuration. (SN: W0E5195159)

W=city of manufacture 0=third digit of year E=month 5=fourth digit of year
(Wichita) 200-? May 2005

Can anyone decode the date for this Moncrief (was owned by Luxaire)?

SN 113203820812 GSU110EF


Thanks, however I know how to read a normal York SN, this one is all digits.

I ran into an old gravity furnace, Luxaire, that was probably the original to the house (built in 1956).

Serial number was 2. :shock: