i don't remember which actually came first, but the earliest one that was important enough to remember was the Revell 1/72 Albatros D.III, built as Voss' ship. no rigging.
The most memorable WWI models from my childhood, however, were Guillows' Camel, built by my dad with some little help from me in Roy Brown's markings, and a really beautiful Guillow's Rumpler, built by my uncle.