According to "EM-2 Concept & Design" by Thomas B. Dugelby, the production figures break out as follows:Originally Posted by oldsoak
20: Original .280/30 models by RSAF Enfield (One or two of these were actually made by Chambons. Another pair were years later converted to 6.25x43mm.)
4: "HV" models by Chambons (A pair of each were originally chambered in either 7x49mm or 7.62x51mm. The 7mm HV-1 is later converted to 7.62x51mm and finally .30-06.)
10: 7.62x51mm models by BSA
15: 7.62x51mm models by RSAF Enfield
10: 7x51mm models by Canadian Arsenals Ltd.