The 'Georgian Bead' (aka 'Marlborough'/Queen of Scots') was originally introduced in 1895 by Frank M. Whiting - at some point started researching the various connections between Whiting, Amston/Arthur Stuart, Concord, Ellmore, and eventually Crown Silver, with various patterns produced bearing different marks (can't recall seeing Crown marks on those different patterns, but they've been noted as owning the Frank M. Whiting flatware dies after Ellmore's 1960 demise). Didn't get too far, and doubt that I'll find time to delve any further in the near future, but do have in my files a 1936 advertisement for Whiting's 1932 'Troubador' pattern as a Concord Silversmiths pattern, pre-dating the supposed 1939/40 Ellmore acquisition of those companies and others, though Ellmore was noted as founded 'circa 1935'.
Don't believe your mark is a lower case 'e', but a 'C' that I've run across several times on flatware in those various connected patterns - suspect it is likely an unattributed Concord Silversmiths mark, probably when a division of Ellmore...
Believe this is your mark, this example found on a Whiting/Ellmore 1944 'Adams' pattern piece:
~Cheryl