This one probably dates to 1913 with the six spoke drive wheels, rivet detail,  single window. Below is a similar variation with the boiler band 

We're not sure what to make of this, it's an early No. 5 cab with single window rubber stamped in gold. The odd part is that it has a reverse bicycle clockwork mechanism usually associated with 1908 or 1909. The motor plate has a 1911 Patent date and the screw holes are drilled in the right places.

This one is Circa 1914-15, note 10 spoke die cast wheels and single window.

Circa 1916 - Note double window.

Always confusing - here's one with double windows and an early (6 spoke) motor.