beehive tail lamp bulb position question.

[bellbigdawg]

I am finishing up the tail lamp for my 1941 knuck. I have two bases for it. one has a high bulb location, the other is much lower. any idea on what years is what? which one goes on a 41 knuck?

[Rubone]

Seems to me that one of those is for a servicar tailight but I need to double check. Maybe someone else will chime in!
Robbie

[Jerry Wieland]

The change from the low bulb to the high bulb is described in the Introductory Literature and I believe it might be 1942. Somewhere I have the Literature but it is packed away. Servi Car base is the same as Solo bike but the cover is different.

Jerry