My grandfather collected Ruby glass and forest green glass, and we were always told that it is from Anchor Hocking. Examining the pieces now, after he has passed, I’m not seeing the typical Archor Hocking identifying marks or any identifying marks at all. I have heard however that Anchor Hocking did not mark all of their Ruby Red pieces. Does anyone know a sure fire way to identify if these are in fact real, reproductions or fakes?