The sticker identifies the company as OLZ Glaskunst Zwiesel, which translates to "OLZ Glass Art Zwiesel." Zwiesel is a town in Bavaria, Germany, known for its glassmaking tradition, which dates back to the 15th century. The region is recognized for its high-quality crystal glass and decorative art pieces, supported by a longstanding history of craftsmanship.

During the mid-20th century, around 1959 when this piece was made, Zwiesel’s glassmakers produced a range of custom and commemorative items. Local companies often collaborated with organizations and institutions to craft unique designs for anniversaries, events, or other milestones. This context situates the item within a broader tradition of bespoke glass production in the region.