Jumelle printings can be positively identified when as marginal copies by differences beetwen perforators used.
For Jumelle Perf Type A printings the margins are perforated:- Top margin(perf through), Bottom margin(imperf), Left margin(single extension hole), Right margin(single extension hole).
For Rembrandt Perf Type A(T) printings the margins are perforated:- Top margin(single extension hole), Bottom margin(single extension hole), Left margin(imperf), Right margin(perf through).
Gutter pairs exist on Jumelle printed sheets but not on Rembrandt printed sheets.
In the Jumelle printing Prince Phillip's face has a clearer harder outline and is in a lighter shade of brownish black but this is not a totally reliable test.
