The tractor was built in dec. 68.
K301 denotes 12hp, the A means it has a special oil pan.
The 47 on the spec# denotes K301 (12HP) The 3 numbers and letter after the 47 are the specific variation to the engine to meet OEM specifications.
The D in the serial# denotes 1968 and the remaining numbers are factory code for line and shift at the factory when the engine was assembled on that day.
Hope this helps.
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