Hi Malcolm, I do have plenty of projects now! I am sure there will be more out there I just have to buy. It wont be running by the time your here but you can run the K and imagine it has a single front!


We have been working on collecting some numbers for the 12-20's concerning the extra 4 numbers that are stamped onto the block. We do not know yet what exactly they stand for but here are some numbers Ervin and Joe have collected for me.

So far I am thinking the first number stands for the year of production. 1 means 1st years of production 2 means 2nd year and so on. I think they started with 1930 models so a 1 might mean 30, 2 means 31, 3 means 32? At this point it is all guessing but increasing serial numbers the first number always increases. same with the last 3. They increase with serial numbers till thefirst number changes. So heres a list and lets see if we can come up with a sounds theory on what it all means!
wallis / MH 12-20
Serial number   Extra block number

#100391              460 or 466
#100886              816    (Engine only no tractor)
#100964            1036
#101206            1130
#101551            1631
#101588            1670       
#102292            2520   (Engine only no tractor)
#102398            2168
#102779            2887 or 2387
#102944            3050
#200017            3105
#200021            3116
#102959            3146
#200045            3708
#103670            3790
#104084            4099
#104190            4611   (Engine only no tractor)
#200072            4784
#104452            4902   (Massey Harris)
#104835            4877
#104666            5093
#104918            5347
#104967            5333    (Massey Harris)
#105073            5533
#106011            6676
#106013            6680    (Massey Harris)