Hi John,
Long time no speak.
Not sure if we ever saw finished photos of the Model 17 you were doing ?
Anyway not quite sure what details you are after with this Model 45 Electric as we can not accurately date it without a petrol engine on it. The Electrics have no coding on the electric motor that would give us any idea but at a guess I'd put it around 1972. Production end of the electric is still debatable but I feel it is around late 1975, early 76. as the last of the electrics came out with the Black chain case and red & white Scott Bonnar Pentagon decals which was just prior to the decals morphing into just black & white and the machine itself having a colour change to Apple Green from Alpine. There were never any Apple Green Electrics made.
Cheers,
BB.