Please help date my new lister d

Hello
I have recently been given a lister d after a family member past away. I am only 20 so know very little about this lovely machines. The numbers I have found on the plate are as follows;
Rpm700
142734
Spec 23dh
Also looking through these forums I have noticed that they are nearly all green but mine is blue ? I think it is the original paint work but would love to know more.
I am plaining to do this up and take it to shows but as I have said I know next to nothing about these so would love more information . Kind regards jake

Hi Jake,
The person you want to contact is David Edgington - his details are given in the Stationary Engine Magazine ( well worth a read) Helpline.In case you haven't got a copy to hand his address is :- Lodge Wood Farm, Hawkeridge, Westbury, Wiltshire, BA13 4LA - He has the factory details and should be able to date your engine and let you know who bought it.David is a very nice,knowledgable, approachable guy.Dont forget to enclose a SAE when writting to him!
As a rough guess I'd say your engine dates to 1938.
All the best,
Kev.

Brilliant thank you, I shall get in touch with him thank you. Any idea of the colour?

Hi Jake
I have actually got a mag that was written by David Edgington and in it the engine you have was produced in June 1938
as for the colour I,m sure David will put you right there, Regards Richard

Thank you very much for all of your help