Bertram McGowan
McGowan worked with Charles Nissen on the plating of the Penny Black and the Penny Red and was the co-author with Nissen of "The Plating of the Penny Black Postage Stamps of Great Britain , 1840" , for which they received the Crawford Medal from The Royal Philatelic Society London in 1922 . 
<triplet> Crawford Medal <subj> Royal Philatelic Society London <obj> conferred by