Could someone identify the model at the left with socket not centered and closer to riveted bracket ?
Are both lamp bodies identical ?
Thanks in advance
The one on the left might be for the two lamp sockets.
The style with the offset down socket on the left is discussed in this post...perhaps for the Couplet in 1915.....
The Two Bulb electric headlamp, (1919-1920) has socket in the center as others, but a grommet hole below to route the single wire to the 2cp (dim) socket mounted in the upper top of the reflector.
This two bulb type for 1919-20 lacks separate grommet hole; uses a double contact plug and entry socket with each bulb individually wired through its reflector socket. The latter are those funny sockets with the retainer clip.