Hi Speedy ,Mf, Ironbark and Norm
The spare Victa motor is from a Victa 18 ,2 nd model alloy base with only 2 side skirt bolts on one side.
the highest number Victa 18 I have is around 351,000.
I'm fairly sure the front metal cover on the cowl isn't original as they were plastic ,the early utility Victa mowers
were a cheap mower so were 125cc then when they did go to 160 cc it was 1968 1969 and Victa was using the
plastic cover on the cowl. Having the muffler outlet go under the base means it's at least a 1971 model.
Victa were still selling the 125 cc ute alongside the 160cc ute .
They are a good mower ,it wouldn't surprise me if I still had 10 of these orange side throws here.
Cheers
Max.