G'day folks,
Yep, this one's a Model 5 chassis, which we call the 'Series 2' of that model, as it still has the 'edger channel' cast into it, a legacy of the model 4.
However, some of the Model 4 casting details are missing, hence the 'Series 2' designation. There was also a 'Series 3'; alloy chassis with no edger channel. Victa lists the Model 5 years of manufacture as 1957-1960, so 1959 would be about right.
The letter prefix 125cc engine serial numbers were used only on the Model 5 series 2 and 3, and early Sheerlines, among the mowers, as far as we have been able to find out. Dunno about the Tiger engines.
As there is no documentation available to us, any attempt to determine the sequence [and meaning, if any] of the letter prefixes is essentially speculation. Keep in mind also that many, if not most, of these older mowers have been 'bitserised' somewhat over the years.
For example, back in the heyday of these models it was common for even servicing dealers to keep rebuilt 'engine cores' on the shelf, for fast swapovers.
