Thank you for viewing. [Rare] Pre-war to Showa Era Craftsmanship: "Rubber Balloon Glass Mold" Retro / Antique / Interior / Reuse This is an old item used by a rubber manufacturing company in Katsushika, Tokyo, from the pre-war period to around the 1970s. Glass molds are rare now because aluminum molds are currently used. Size: Maximum length 24.5 cm Condition: Vintage stock There are some with cloudiness, dirt, small scratches, and rubbing, as well as some with burn marks and rubber residue. (No cracks, chips, or breaks) * Please check the images.