Nice mower. I'm pretty sure it's a Victa Mayfair which ran from 1965 to 1968. It came out in three models (529, 539 and 549) and also had a 4-stroke variant. The main difference between the three models was the engine. The 529 had the 17N engine, 539 had the 17CG engine and the 549 had the 17DD engine. The Mayfair was pretty unique in that it was one of the only models to run the split handle bar setup. I'm not %100 sure that you have the correct catcher (the Mayfair had the model 9 catcher), but It looks great regardless. Thanks for posting!