Hi peatert, No mate, the year is not on the SB ID plate.
You will only see the Model No and Mower No on the plate.
The easiest way to date a Model 45 is by the numbers on the cowl of the Briggs and Stratton engine.
I don't know how to read the numbers formula but Bruce or somebody on this forum will, and it will give you the approximate age of the mower.
(providing it is the original engine, which they usually are) wink
BTW, Rover took over Scott Bonnar in the early '90's
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin