Huh, that's odd. What would change the internal gears? There's nothing on either side of the bolt, like in schwinn 3-speeds I've seen... And after looking at it again, I can't see anything that could be connecting the internals to a cable. I just noticed it says 'torpedo' on the brake lever and found a post on the forums about these.
"Torpedo" was a name used by several hubs made by the old Sachs company. This included single speed coaster brakes, two speed kickback and automatic, and three speed hubs.
sachs also produced the torpedo boy 2spd auto hub.
Since there's nothing that connects to the interior I don't think it's a 3 speed (are there auto 3 speeds?), which leaves a 2 speed auto, 2 speed kickdown, and single speed. Since it only has sachs torpedo on the brake lever (not torpedo boy) it seems like it's a single speed or two speed kickdown?