That Ryobi mod was a memorable one - first saw it a year ago when looking for the manual for that model (I have one and it makes a good enough sound without the scooter muffler)
The Mayfair utility seems to have been marketed for a couple of years. The picture below is from the
1983 victa brochure.
Out of interest Max, what is the date code on that 125? I presume they stamped it when the motor was made, not when it was put on a mower deck
We are always finding interesting new things about Victa's of this era. It's like
this sunbeam, I never knew they dressed up a corvette or sabre in the Sunbeam colours.