G'day folks,
The correct blade type for this one is the NLA Victa P/No CA09262S, or 9-262 in the old Victa system; picture
HEREIt so happens that, if wce doesn't have any in his collection, there's a job lot of blades up on the Bay of Fleas just now which includes some of these;
https://www.ebay.com.au/itm/vintage-Victa-mower-blades-NOS-1960-1970s/143572756469