When I first started the Trusty Register I used the JAP engine dates to give a rough idea of age but you have to be careful that the machine hasn’t had a replacement engine during it’s lifetime.
In the absence of accurate factory records it does help to make a collection of all known machine serial numbers, list them in numerical order and sprinkle a few JAP engine dates in the mix and you get a good idea of the age of the machinery.
Steve Denness is the chap you need to speak to who runs the register for Colwoods; look his number up in The Cultivator.
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