Actually FY8456 is correct. This engine was fitted to a 2 Speed Flying Squirrel with Frame No 1379. This Scott was despatched to Brown of Thetford on 16 July 1925.
Super Squirrels and Standards whether 2 or 3 Speed just had a Y or Z prefix. I do not know whether the Flying Squirrel engines were in a higher state of tune or just specially selected. Perhaps someone would like to comment. I suppose they may have had the block with a larger diameter exhaust stub.
Your Scott has been known to the Club since 1985. A 2 Speed Sports Squirrel UT 5377 registered on 8 June 1929. I believe it has the long tank.
