Cast Iron Foundry Mold for Glass Obsolete Incandescent Light Bulb USA

Description

Original cast iron 2 piece mold. Possibly for specialty glass light bulb or vacuum tube. High volume cast iron mold for the production of the now discontinued incandescent light bulbs or rectifier vacuum tubes for TV and Radio. This one appears to be for an automotive lamp or similar type.
Some familiar shapes and styles listed
individually
as well as some really old and unique types.
This size tube mold  measures 3 1/4 " x 1 3/4 " , actual bulb is about 1" dia. x 2 " .  Weighs 1 1/2 lbs.
I will combine shipping on multiple purchases
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INTERNATIONAL SALES ARE NOT AVAILABLE ON THIS ITEM
I WILL COMBINE SHIPPING ON ALL MY LISTINGS TO MINIMIZE COST AND INSURE SAFE SHIPPING
Osram Sylvania of Wellsboro is the mass producer of incandescent bulb shells, and Christmas ornaments. The light bulb shells are then sent to the St. Mary's, PA branch for the addition of filaments. In 1926, then owned by Corning Glassworks, the first ever Ribbon Machine, created by William Woods, was installed in the Wellsboro Plant. This produced light bulbs at a rate of one million bulbs in 24 hours. This machine is still in use today, and after a few modifications and fine tuning it now produces a record 2000 bulbs a minute! This changed the way the world used lights forever, and in 1983 The Ribbon Machine aka The Corning Machine was added to the International Historic Mechanical Engineering Landmarks List.