Antique HG Co Teal Glass Telegraph Insulators
Updated August 21, 2026
This auction ended on August 29, 2026.
See upcoming auctions from Method Estate Management or current antiques & furniture auctions.
| Lot number | 242 |
| Category | Antiques & Furniture |
| Auction | Kostas Volume 13 |
| Date | August 29, 2026 at 12:00 PM EDT |
| Auction house | Method Estate Management |
| Location | Belgrade, Montana |
This antique auction features a stunning early 20th-century dark forest green glass insulator, perfect for industrial telegraphica collectors. The striking piece showcases a heavy, dome-topped design crafted in a deep emerald or pine green glass variant . It features standard internal threading alongside authentic manufacturing details like prominent glass swirls, mold lines, and embedded air bubbles. Showing light age-appropriate surface wear, it is ideal for historical communication displays
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