I remember you (Gadge) saying you used to change all the 9B carriers for the 9C for ease of fitment. What confuses me is...Ive never had a Special with a 9B plate. Does this mean they changed every one? I cant see it.
Every dealer-serviced one would have been changed over I'd say, purely for cost [and convenience] reasons. Victa's dealer price for the 9C carrier assembly [with fitted blades] made sure of that. Even at the hourly labour rates we charged back then.
Doesn't mean that no originals exist; just that they will be about as common as rocking horse dung. And most likely to be found in areas remote from servicing dealers.
My point is, in your opinion what year was The 9C carrier released and is there any documentation?
Can't help you with any evidence for that, I'm afraid; our family OPE business started in 1973. The carrier/blade set swap was the go then, though we still had legacy 9B carrier parts in stock, as we took over an existing business, founded in the 1950's.