Glass bottle of 25 mg "Fortral" pentazoine hydrochloride( an opioid analgesic) pain-killing tablets. 69mm x 42 mm diameter, 74g. Manufactured by the Bayer Products Co., English, 1970-1980. Brown glass bottle, with white metal lid, of 25 mg 'Fortral', 69mm x 42 mm diameter 1970-1980