Joe,

Some useful  info there and I hope more comes in.

Today it's a 1915 Wallis J which I believe followed the Cub.  It's perhaps more commonly known as the Cub Junior and one which is on our list (or at least my son's!) to acquire.  I regret now not getting that one at the Yuma auction but you spend on the day and think you have spent enough in one day!!

I like the Cub Junior as it seems to be so obviously a forerunner of the Challengers but this would not have been forseen at the time??