Thanks, guys!
And yes - the papier-mache thing (I should have said
early Doctor Who villains

) is a huge part of their charm.
They're clearly based on the classic Dave Trampier illustration from the Monster Manual:

I reckon the frill around the miniatures' shoulders might be a misinterpretation of the creature's pecs in Trampier's drawing. The illustration itself kind of suggests that the creature might have human parts and lizard parts: more a bizarre hybrid like a Minotaur rather than an anthropomorphic reptile. And why not? Animal-human hybrids might be even more appropriate for a fantasy game than intelligent reptiles precisely because they're more in line with centaurs, minotaurs and satyrs.
These Essex guys are just some of the miniatures based on Trampier's illustration. The Grenadier AD&D lizardmen (painted magisterially
here by Spooktalker) are another lot, and then there's this old guy from Citadel (on the left):

If I get hold of another copy of him, I'll definitely try out the human skin tones!