yep, 550 pro series, ( all these where sold as pro series) and are a great slashing mower, they came as push or self propelled. I have had two for years and they are well worth saving. The only real difference to the rest of the Victa range is they run a longer lower crank than normal, yours has a very interesting tread pattern on the rear wheels.
As for what their worth........the last one i got was from the nature strip
