RS169b J. McCullough Duponco’s Periodical Pills medicine stamp
$60.00
John McCullough was an agent for Kidder, Wetherhill & Co. in 1880 who were marketing Duponco’s Female Pills after 1873. Since McCullough was ordering his own private die proprietaries it is not certain whether they were used for Duponco’s Pills or for other proprietaries being marketed by McCullough. In any event, nothing is heard of McCullough after 1883.
Holcombe, Henry W., American Philatelist, 55: 253-254, Jan. 1942