Antique Keasbey & Mattison Cobalt Blue Chemist Bottle – Philadelphia & Ambler, Late 1800s

Founded in 1873, Keasbey & Mattison began as a pharmaceutical and patent medicine company before shifting to industrial products. Their cobalt blue bottles—embossed with “Keasbey & Mattison Co.” and “Philadelphia” or “Ambler”—were iconic fixtures in apothecaries of the 19th century. The deep cobalt hue offered both brand identity and protection from light degradation. These bottles remain a collector’s staple, valued for their connection to early American chemistry and the dual Philadelphia–Ambler heritage that marked one of the most ambitious transitions from medicine to manufacturing in U.S. industry.