RS253e Dr. Joseph Walker Vinegar Bitters experimental silk medicine stamp
$500.00
Dr. Joseph Walker joined with Richard H. McDonald, a wholesale drug gist in San Francisco, in 1867 to manufacture California Vinegar Bitters. The firm soon opened a branch in New York City where Walker took charge leaving McDonald in California. Walker died in 1877, but McDonald continued the firm at least until 1880.
(Holcombe, Henry W., Scott’s Monthly Journal, 22: 156-160, July, 1941)