I have this small single cylinder engine that I inherited from my Dad. Check out the links for pictures. I don't believe it has ever been run and I would like to find any information about it that I can. The only markings are "Whitney" and "London".
I don't know... but my guess (just a guess) is that was sold as a casting kit... it has that look to it. You might check some of the early British model engineering type magazine and look at the ads.