Here's a pic of mine showing all three together.
View attachment 1244183
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Awesome helmets Gino love how they look on your life sized display's to me they really look like the real deal!
So coming to the ANH it's basically as I know the Brian Muir sculpt the ANH was the father of the ESB and ROTJ mask and helmet
so by looking at your helmets and using my logic
What changed from ANH-ESB-ROTJ is as follows
The ANH mask and dome was made
The mask has a small chin vent and is painted gloss black and brushed with silver highlighting
the Dome has a sharp widows peak with the Y crease and an indentation
the dome mowhawk on the ANH is the narrowest in with
The ESB was made from an ANH cast of the screen used original yes?
dome and face mask
hence I can to my eyes see that your ESB helmet reflects this
as it looks the same as the ANH but with the ESB modifications
so as I see for ESB
the mask is basically an ANH mask it's not smaller or narrower than the original ANH by looking at the photo
the lower chin vent is larger
and it's painted with very glossy paint and polished to a high glos shine
The dome
is basically an ANH dome except it seems for ESB
the sharp widows peak is trimmed down the Mohawk appears a bit wider
the Y crease is filled in it seems
and the dome sits bit higher on the face than the ANH dome
and is painted with gloss black and polished to a high gloss shine
and then the ROTJ is again an ANH mask and dome
with the mask
Having a larger than the ESB chin vent
but the mask is still the same size as the original ANH
the Mask is also painted glossy two tone like ESB
The dome is basically an ANH dome
with a wider Mohawk than the ESB
sits a little bit higher than the ESB did
and the Y crease and indented area of the Mohawk filled in
and painted same as ESB glossy black polished to a high shine
Just by looking at what I see would that be correct I can not see any other modifications
such as there being a difference in dome length or even that the masks vary in size from one another