Hemingray No. 9 Glass Insulator Value Guide

The Hemingray No. 9 is a quintessential piece of American telecommunications history, produced by one of the industry's most prolific manufacturers. These aqua glass insulators are highly collectible due to their connection to the rapid expansion of telegraph and telephone lines in the late 19th century.

What Is Hemingray No. 9 Glass Insulator Worth?

The typical price range for Hemingray No. 9 Glass Insulator is $10 - $20 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the glass, specifically looking for chips or 'flea bites' on the sharp edges of the base.
• Clarity and depth of the aqua color, as deeper or more vibrant tones can command higher interest.
• The crispness of the embossed patent date and manufacturer markings.
• Presence of original manufacturing bubbles or unique glass inclusions that add character to the piece.

How to Identify Hemingray No. 9 Glass Insulator?

• Look for the embossed 'PATENT MAY 2 1893' date on the base or skirt of the glass.
• Confirm the 'HEMINGRAY' name and 'No. 9' model number are clearly molded into the glass body.
• Verify the classic aqua color, which is the most common and authentic hue for this specific production run.
• Check for the internal threading design, which was a key feature of the 1893 patent for pole attachment.

History of Hemingray No. 9 Glass Insulator

Glass insulators like this Hemingray No. 9 were crucial to the expansion of telegraph and telephone lines across North America. The Hemingray Glass Company, established in 1848, became one of the largest manufacturers of these utilitarian objects. The patent date 'May 2 1893' refers to improvements in insulator design, likely related to thread patterns for better attachment to poles. Collectors often seek out these pieces for their historical significance, varying colors, and unique markings.