Kohler Magnum 20 Crank Shaft Seal

I have a Deutz Allis 1920 tractor with a Kohler Magnum 20 engine with a front engine oil leak that appears to be the crankshaft seal. My engine identification plate is mostly illegible. There is a 10 digit number mid-way on the plate that appears to possibly be the serial number. The information on the plate seems to be printed and not stamped.
The seal has 8E1059E NOK stamped on it. I need the replacement seal and oil filter and I would like to identify my correct model & serial numbers for this and future part needs and inquiries.

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