The two examples pictured carry dates on their motors the one above is 1922 and one below is 1921 - they have double cab windows with flared boilers. The example above has a nickel boiler band, we're not sure if the one below should have one also.

This one has a 1917 date on the motor. but it has cast wheels and had a drive rod. This would be like a No. 6 from that period