Kubota L3710, JD5300, AC D19, IH 806, IH 8950, Ford 8N, Farmal Super M, several others in the past.
Thanks for the tip of "tractortips.com". The add didn't specify if DT, F etc. At least I now know it is about 30 hp and made in the late 70's to 1981. Gives me an idea of what to expect.