It's a side pull full crank so dates from the early 1980s sometime. I believe they are merely called the Victa Self Propelled.
That one looks very sun stroked. Nearly all the plastic grill at the top has disintegrated. Does it run?
I also notice someone has fitted 8" wheels on the front when they were originally 6". Looks silly.
Getting the original self propelled specific catcher would be very difficult. The latter series self propelled specific thumb latch catcher will fit and there is a much better chance of finding those as the professional series mowers with them were still being made in the 2000s. You can still order one new but not cheap at $150.
Your pet panther also looks curious what this model is.
Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
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