Spring Production Balls circa 1900: scarce

These are very difficult to find,  Over 120 years old they are a spring ball which collapses and expands  for production. Used in glass production boxes and other production apparatus. Very few survived.  I have seven for auction with 6 of them being in very good condition and one in fair condition.  they are about 3 inches in diameter.  Great for display with your antique apparatus.   Cards are shown for size comparison only and not part of the auction.

Estimate $200-300