This will not be a two speed - Sturmey did not make two speeds until 1932/3 and these all had the stepped barrel. Is the hub shell nickel or chrome plated? A photo will help to determine if it is a Sturmey or what it might be - if it is a two speed it will date back to the pre-1910 period. SA K type hubs were made from c1921 onwards - until 1933 they were not dated but had a simple sequential number.
Hilary Stone, Bristol, England
> I have a rear hub from before 1932/3 (think it's a two speed) that I'm hoping
> someone will be able to date. This one has just the six figure code on it:
> 683820. There is nothing else at all on the hub aside from these six digits.
> If it's an SA, it pre-dates the K-series code but I don't know if it's simply
> a production number or whether there is some other date code at work. Any help
> would be much appreciated.
>
> Thanks,
>
> Bruce
> Dundee
> Scotland