ANTIQUE CAST IRON Obsolete Incandescant Light Bulb Molds Sylvania Corning Glass

Description

This is a Lot of 10 obsolete cast iron molds for the production of incandescent light bulbs.
These 10 styles are for  various holiday,  indicator lamp, TV / radio vacuum tube and other small lamps.  Bulbs ranging from 3/4" to 1-1/2" in diameter. They came from an inventory sale of a turn of the century high production Sylvania mill in northern Pennsylvannia. The molds weigh about 1-2 lbs..
I have many other sizes and styles listed individually in my store and will combine shipping to minimize cost.
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.
INTERNATIONAL SHIPPING IS NOT AVAILABLE FOR THESE ITEMS