Hello chisel57
The link I supplied (above) concerned a Model 40 electric.
We have no Model 45 cordless photos for the record (that I can find).
It would be great if you could upload some photos of your machine.
Now, dating you machine is difficult. The cordless 45s were not introduced
when the Model 45 was introduced in the late 1960s. I believe the Cordless were
made from about 1970 and continued in production until the late 1970s.
They are rare today, because these machines sold in low volume when compared
to the petrol machines. Even the mains electrics were more common.
Unfortunately, they don't seem to be that collectable, mainly because of
their rarity making them largely unknown. Value is whatever the animal spirits
in consumers will muster on market day on the High street.
The Model 45 has the best parts availability of any Scott Bonnar model.
Here I mean the wearing parts - blades, bearings, chains, etc.
I have met a couple of owners of these machines and I have never found one that
has not liked their 'little electric'. They will run for an hour and a half on
a charge and should be recharged overnight before use. I do not know whether
modern battery technology might improve this. One of the site engineers -
Gadge or Grumpy - might know this.
When you consider the popularity of cordless mowers today, you have one of
the pioneering machines of the then emerging technology.
Hope this helps.
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JACK