I'm stumped. (I know...and am sorry about that.) I have gone through my reference books cover to cover. Can't find this little guy anywhere in the photos. He most closely resembles the American GI's produced by Crescent in the 1950's, but they all have "round" bases and yours is a "square" base. His helmet appears to be American, however, Barclay's soldiers from Japan (1937-ish) have very similar helmets. No Barclay Japanese soldiers have your soldier's pose though. So, this guy is an enigma, may be a prototype, and maybe some toy soldier expert can help us all out in the near future with an ID. He is cool, a great addition to your old toy collection. Sub