https://revenue-collector.com/pages/3083.html
R141 - 40c brown and black - U.S. Civil War Revenue Stamps - Revenue-Collector.Com
A reference page showing an example of R141 - 40c brown and black, with a black printed/typeset cancel dated March 07, 1872 from Brady's Bend Iron Co. in...
https://fomas.ru/katalog/arkhiv-kollektsiy/muzhskie-arhiv/r141.html
R141