Hi all I am posting this new thread to share my discoveries about this marvellous prop, I mean the Han solo droid caller.
After seeking and buying some Kobold flashguns I know a little bit about them.
please notify I will share some "annal" details as Sym cha would say aha!
For the moment I have seen at least 2 versions for ESB droid caller...
this one:

Would probably be this one too:

Specs are, from top to bottom:
-stepped emitter(will name it as it is a lightsaber ok?)
-no bulb holder
-missing bulb retaining nut
-black painted D ring( name it because of luke ESB lightsaber lol, even it's a reflector display holder in fact) with side by side bolts.
-red painted drilling on black bakelite section
-right of D ring is empty
-narrow(present) type button lever on left.
-black re-painted body with pain flaking
-narrow type bottom
Then a second version:

We can see the large end on bottom instead of narrow and the glossy D ring, not black painted, but I can't tell more because it's difficult to see other details even with several kobold vriation in the hand....
I would bet on a empty room on right of thr D ring, no light.
Seems the retaining nut is present on the emitter, but I don't know what type of emitter it is, no bulb inside.
Here are side by side two kobold variations, with about all variations on 2 different flashguns, none have bulb holder, there are several bulb holder variations too, none have additionnal light there are at least 2 light variations too, I will explain it later, with other photos.

On top:
-rounded and beveled emitter,from the small to large diameter the link is a roounded shape, not stepped.
-"opposite" bolts sanded D ring, the D ring has a bolt on each side of the internal groove it has glazed finish by sanding before nickel plating.
-no red drilling
-narrow type blade lever button
-small nut on round contact button
-black painted body
-narrow bottom section, aluminum color
Bottom:
-stepped emitter
-2 side by side D ring bolts placed on top ( LUKE ESB lightsaber version)
-glossy D ring
red drilling, the body is drilled then filled with red paint
-large type lever button
-large nut on round contact button, to be very annal we can see the small grooves are different too, lol
-aluminum color body
-large end section ( about twice the "narrow" type)
the retaining nut on emitter is abesnt on photo but it's same variation.
After seeking and buying some Kobold flashguns I know a little bit about them.
please notify I will share some "annal" details as Sym cha would say aha!
For the moment I have seen at least 2 versions for ESB droid caller...
this one:

Would probably be this one too:

Specs are, from top to bottom:
-stepped emitter(will name it as it is a lightsaber ok?)
-no bulb holder
-missing bulb retaining nut
-black painted D ring( name it because of luke ESB lightsaber lol, even it's a reflector display holder in fact) with side by side bolts.
-red painted drilling on black bakelite section
-right of D ring is empty
-narrow(present) type button lever on left.
-black re-painted body with pain flaking
-narrow type bottom
Then a second version:

We can see the large end on bottom instead of narrow and the glossy D ring, not black painted, but I can't tell more because it's difficult to see other details even with several kobold vriation in the hand....
I would bet on a empty room on right of thr D ring, no light.
Seems the retaining nut is present on the emitter, but I don't know what type of emitter it is, no bulb inside.
Here are side by side two kobold variations, with about all variations on 2 different flashguns, none have bulb holder, there are several bulb holder variations too, none have additionnal light there are at least 2 light variations too, I will explain it later, with other photos.

On top:
-rounded and beveled emitter,from the small to large diameter the link is a roounded shape, not stepped.
-"opposite" bolts sanded D ring, the D ring has a bolt on each side of the internal groove it has glazed finish by sanding before nickel plating.
-no red drilling
-narrow type blade lever button
-small nut on round contact button
-black painted body
-narrow bottom section, aluminum color
Bottom:
-stepped emitter
-2 side by side D ring bolts placed on top ( LUKE ESB lightsaber version)
-glossy D ring
red drilling, the body is drilled then filled with red paint
-large type lever button
-large nut on round contact button, to be very annal we can see the small grooves are different too, lol
-aluminum color body
-large end section ( about twice the "narrow" type)
the retaining nut on emitter is abesnt on photo but it's same variation.