Without marks it can be really hard to find inforamation. If you want a starting point, First look around at Fostoria, they are known for this style mostly. Would have to agree that it appears to be post 70's in style. With so many export Glass companies out there esp. China, could be just that a export. But like i mentioned earlier possible a Fostoria. Also the pattern is a Wheat and Floral style if that helps.