Campbell writes of them in his book as being built on the flat side low wall receiver as either coming in a 15" or 16" barrel, having a saddle ring and chambered in the 4 common pistol calibers. They were the lowest priced in the 1885 Winchester line. They had round barrels and no schnable or insert in the forearm. No mention of 20" barrels. many were sent to NZ, and Aus. and marked Stinger or Daisy
If you go to the Winchester Collectors website, Bert Hartman can probably help you out as he has cataloged most of the 1885's. I would think the forearm and the saddle ring would be a good indicator of whether it's legit or cut off.
