Pierssy, as nobody else has stepped up on this one, that mower looks a lot like a 'Pro 505SP' model, as it's known in Oz.
The Victa 'Pro' series are their heavy duty models, intended for the professional 'lawnie' contractor, and local council, market. 505 = 505mm width of cut, in that model number. These models haven't changed a great deal over time, since 1984 when the Victa half-crankshaft PowerTorque 2-stroke engine was introduced.
Download the ~2000 Victa Illustrated Parts List [1.8 MB PDF file] from
HERE , and check out p. 32 for the mower, and p.18-19 for catcher info.
