It is neither 1917 or 18 , It is 1919 or 20 , makes a big difference in the value. There are a lot of Mitchells around, I have four. it's amazing how they keep turning up. I was watching the ebay auction and wondered how it was identified, now I know. Appears to be in very good order , I could use some of the parts and would happily bid if only it were closer. Perhaps the winning bidder might like to sell me some bits??? NOEL