It bears a passing resemblance to a very early Citadel Salaman on Giant Strider, but it's actually an Asgard Minatures Lizardman on Land dragon (code FM64). Four of them together is a nice find!
Like the similar Citadel model, the design is certainly influenced by the AD&D monster Fire Newts (or was it Firenewts? ) which were smaller red skinned fire-breathing lizardmen, basically. The Giant Strider, which could spit fireballs, was their favoured mount. Probably why you painted yours red! The early Fantasy miniatures industry was very much entwined with the rise of (A)D&D (and other RPGs) - Citadel Miniatures started in 1979, Warhammer first appeared in 1983 and the distinctive background fluff comes even later.