OK, Deere had the Waterloo Boy (models N,R ect) Then they introduced their first "in house" tractor, the "D". Then they released the "c" (smaller than the D) The "C" was the prototype for the GP, which was also sold as the GPWT, GPP, GPO, ect. Then Deere started making the "A", (AO, AR, AW, AN ect) The A needed a smaller brother. The "B", (BN, BO, B, BW, ect) Then they wanted "bigger" Next "logical" letter? The "G". (Again, GW, GN, GM, ect) All along, the venerable "D" was still the big hoss. When the "d" was getting long in the tooth, a diesel "Big tractor" was introduced. The "R" semed logical. (Even though the "D" was still in production) When the need for something smaller came along, the "H" was born! (HW, HN, ect) It was around for a few years until its replacement came out, the model "M". Deere started about this time to build a VERY small tractor. The "L" It became the "LA" in due time.
Making any sense?
GOOD!
It doesn't to any of us-----------------