The South African shipments were for 13,847 4 in. .38/200 caliber revolvers and 7,500 5 in. .38/200 revolvers . Many went through John Block & Co. Pier 14, NYC, a freight agent. The first "shipment" ( or contract) was on Feb. 19, 1940 for 8,800 guns , 2nd "shipment" on Sept 9. 1940 for 5.047 gun. Both of these shipments were for 4 in. revolvers. 3rd "shipment" was June 7, 1941 for 7,500 5 in. revolvers. This information is from Neal & Jinks book. Letters on these guns do not always reflect the above ship dates. For example, # 696338 letters as shipped on May 3, 1940 and is a 4 in. gun. 686,697 and 686887 letter as May 22, 1940 as part of a 1400 gun shipment. 686718, 687083 and 687110 were in the May 3rd shipment as part of a 1,000 gun shipment to the Director General of the Directorate of War Supplies., Union of South Africa. 688128 is a 4 in, shipped June 4, 1940. 690876 was shipped July 8, 1940, and 693675 was shipped in July also. My guess as to why the individual guns letter with different ship dates that the overall count of 13,847 guns for the three shipments, is that the three shipment dates are invoice or contract dates. Maybe Roy can comment on that. Hope this helps, Ed.