Very nice! I too own a 72" Servis Rhino blade, its of the late 70's vintage I believe. Bought mine used also
Mine is a Rhino "LR" which looks to be an older version of the current rhino model 500.
They are built very well. It would take a lot of abuse or plain misuse to beat one up. I have plowed literally miles of snow, yards of soil, graded driveways, re-established a driveway complete with ditches, moved mountains of manure, even piled some brush.
A very good investment a rhino blade is.