Originally Posted by dwoloz
The shifter is definitely Sturmey-Archer as it says it right on there but the hub does not mention SA. The hub body says "Sears", "Hub Model 503", "3 Speed" and "Made in Austria". I'm thinking its an SA with a different hub shell.
I know that my 1961 Schwinn Jaguar has an Austrian made hub that is Sturmey Archer compatible... My guess is that yours is probably a copy as well, just with a different shell.