Hi all, I’m not a two-speeder person, but a few weeks ago I bought three two-speed gear units as part of a spares cache. They have been badly stored, but the rust on the sprockets was superficial, and most of it cleaned off very easily, revealing very little wear on the teeth. Before moving them on I would like to identify and date them. What I suspect is the oldest has an open-spoked larger sprocket (25 and 46 teeth), and is stamped 1995.
The next one also has an open-spoked larger sprocket (25 and 47 T), and it is stamped with two numbers, 3765 and 8469.
The third one seems to be closer ratio, at 25 and 36 T, and the larger sprocket isn’t open spoked. It is stamped 7756 and 3765.
The eagle-eyed will have noticed that the number 3765 occurs on two of ’em, so what is a serial number, and what is an overhaul number, is unknown to me. Any two-speed experts out there able to enlighten me ?
Having rebuilt a couple of original matching number 2 Speeders my observations are that the serial number of the gear is stamped on the top face of the flange of the hub. This number is repeated on the plate on the low speed gear that holds the sprocket to the drum. Often low gear drum and sprocket assemblies were swapped when owners experimented with different low gear ratios so the numbers may not match.
Scotts issued 2 speed gears to the assembly line in the same sort of semi random way that frames were issued. ie not in strict numerical order but within a range. The serial numbers are recorded in the Sales Ledgers. I can tell you that 6544 is May 1926, 7721 Aug 1928 and 8298 Dec 1929. In 1919 they were in the range 5-600’s so I would estimate 3765 is in the early 1920’s.
I do not know if gears that were overhauled by the factory had a repair number stamped on them but I rather suspect that few gears would have been overhauled by them rather than a local dealer.