112 GT SN 100,001- Up
For this range of tractors, the serial number plate will look something like this---

T0650     112,993M

T0650 is the type code (see below)
112,993M is the serial number
Identification Codes   Note-- Some codes are used that mean different things in different years, so you must have the serial number to figure out the proper code.

Note--I have discovered a couple of sales bulletins that show that you could tell tire type by the typecode for the 1968 models and that until approximately November 25 of 1968 the 1968 typecodes were used, meaning that the first few 1969 models could have 1968 typecodes.

Code              SN Range                    Year          Color          Engine                  Lift Type       Tires       
T0650           100,001-130,000         1968          Green         10T                       Manual           GT-3
T0651           100,001-130,000         1968          Green         10T                       Manual           GT-4
T0653           100,001-130,000         1968          Green         10T                       Hydraulic        GT-3
T0654           100,001-130,000         1968          Green         10T                       Hydraulic        GT-4
T0651           130,001-150,000         1969          Green         10T                       Manual
T0651           130,001-150,000         1969          White         10T                       Manual
T0657           130,001-150,000         1969          Green         10T                       Hydraulic
T0657           130,001-150,000         1969          White         10T                       Hydraulic
T0652           150,001-160,000         1969          Green         10K                      Manual
T0652           150,001-160,000         1969          White         10K                      Manual
T0653           150,001-160,000         1969          Green         10K                      Hydraulic
T0653           150,001-160,000         1969          White         10K                      Hydraulic
T0651           160,001-180,000         1970          Green         10T                      Manual
T0654           160,001-180,000         1970          White         10T                      Manual
T0657           160,001-180,000         1970          Green         10T                     Hydraulic
T0655           160,001-180,000         1970          White         10T                     Hydraulic
T0652           160,001-225,000         1970          Green         10K                     Manual
T0656           160,001-225,000         1970          White         10K                     Manual
T0653           160,001-225,000         1970          Green         10K                     Hydraulic
T0658           160,001-225,000         1970          White         10K                     Hydraulic
T0651           185,001-250,000         1971          Green         10T                     Manual
T0654           185,001-250,000         1971          White         10T                     Manual
T0657           185,001-250,000         1971          Green         10T                     Hydraulic
T0655           185,001-250,000         1971          White         10T                     Hydraulic
T0652           225,001-250,000         1971          Green         10K                     Manual
T0656           225,001-250,000         1971          White         10K                     Manual
T0653           225,001-250,000         1971          Green         10K                     Hydraulic
T0658           225,001-250,000         1971          White         10K                     Hydraulic
T0011           250,001-260,000         1972          Green         12K                     Electric
T0011           260,001-300,000         1973          Green         12K                     Electric
T0011           300,001- Up               1974          Green         12K                     Electric

Tire Codes
GT-3--16x6.50-8 front 23x8.50-12 turf rear
GT-4--4.80/4.00-8 front 23x8.50-12 traction rear      
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