G'day Mark et al,
Here are a couple of pics that fill in the bladeholder supersession gap - the CA09320A assembly.
The first pic is from the Victa 1976 season Range Brochure;
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/86755The second is from the 1955-77 Workshop Manual [Scientific Publications Manual No. 103], Section S - 'Supplement 1976-77 Mowers'.
As can be seen, this one was circular, unlike the later types. These were successive design changes, with the intention of improving grass-catching performance, for all rear catcher models.
As the earlier bladeholder types were superseded, they were deleted from Victa's spare parts inventory.
The CA09252A to CA09303A transition also incorporated changes in the blade design, and its fastening setup.
The CA09306x blade set was fitted to all of the later bladeholders, from CA09303A onwards.
This blade incompatibility is the reason that the 'transition mower models' in that 'Victacode Quick Reference' mention two bladeholder assembly types - the early CA09252A, and the current replacement assembly
as of 1991. No point in listing the NLA intermediate types...
