Dave Osburn Modern Glass Windows Vase. Dave was a glassblower at Blenko glass for over two decades before opening his own studio in Milton, WV, in the old Gibson glass building. While working at Blenko he made a few similar vases that he called "Windows" vases. The Windows vases were sold in the Blenko gift shop while he was still working at Blenko. This vase was produced and sold at Dave's studio, Osburn Modern Glass. The vase is burnt orange and the outside, white on the inside, with three clear windows. It is about 9 inches tall and 3 1/2 inches in diameter at the bottom. The pontil mark is stamped with the stamp Dave used on many of his designs. There are no chips, cracks, or other issues.