CD 133 index [230] Brookfield. Embossed W. BROOKFIELD / Large shop number 4 / 55 FULTON ST / N.Y. Back CAUVET'S / PAT / JULY 25, 1865. Strong MLOD and strong embossing. Great swirly thread start. A very nice extremely early piece of threaded glass. For sake of accuracy, a faint halo from a BB ping and an area with some slight wire groove rubbing. Most people would call this mint for an insulator that is likely 130+ years old. $20.00 + shipping based on zip code. I will be offering a number of additional insulators and will combine orders to save on shipping.