Most likely a 1450 from 1975 or 1976. Once you get the genset off, there should be a serial number tag on the back of it. From the serial number the year and month of manufacture can be determined.
Kraig - I think you're memory is slipp'n a little.
Todd - you definitely have a Cub Cadet from what's known as the "Quiet Line" series, AND, since it's a Hydrostatic drive it has to be either a model 1250 (12hp), 1450 (14hp), or 1650 (16hp).
There should be a serial number tag on the left side of the frame close to where the brake pedal is located (when the brake is off). (I think this is what Kraig forgot - he was thinking of an earlier model that had the serial number tag on the back of the rearend housing).
The number on the tag will have 7 digits followed by the letter U and then 6 more digits, i.e. 2050000U000000
The first 3 digits in the serial number will be 205 (which means it's a Cub Cadet) and the next 4 digits could be any of the following:
0059 or 0610 or 0630 is Model 1250
0065 or 0066 or 0660 is Model 1450
0067 or 0070 or 0670 is Model 1650
The letter "U" indicates it was built in the good ole U.S. of A.
The 6 digits after the letter U are the actual build serial number specific to the tractor. If you tell us that number we can tell you the month and year it was built.