Check the listing for details. WW2 Canadian RCN Radio Operator 2nd Class Trade Patch 2. Condition: Used. Listed at 10.00 USD. The WW2 Canadian RCN Radio Operator 2nd Class Trade Patch is a historical military artifact associated with the Royal Canadian Navy during the Second World War. As the title suggests, the patch signifies the rank of a second-class radio operator, an integral role within the naval communications hierarchy.