Hi Mikegq, and a warm welcome to the forum. grin
It's always nice to welcome another Scott Bonnar Model 45 owner, as we all like to learn new things and tinker here. wink
Your machine is an early Series 1 Scotty (having the solid engine deck), and would have been manufactured in late 1968. The date of manufacture of the Briggs and Stratton is the 5th August 1968.
The solid deck Scotty's are more desirable as the Series 2 with the twin rail deck, are prone to fatigue cracking caused by engine vibration. wink

Your machine is in terrific original condition with the silver Briggs which is correct and with the TLC you are giving it, will give you hours of mowing pleasure. grin

Once again Mike, :welcome: to OutdoorKing.
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