Lamp electric No 1-2-3?-4..

[NCA]

I have in my collection Lamps electric No1&2 and 4.Im assuming there was a number 3?What did it look like?Also im guessing the batteries that powered them are now obsolete but what did they look like?Thanks.Ill put some pics up of my lamps later.

[joseph barrett]

I have 1 2 and 4 as well and I cant find any mention of a MK 3 at all in any of my reference material.