We have worked out many of the manufacturing difficulties in producing these chargers. There are the 2 versions of the US GI M10 chargers part 1005003488653 There is an old version and a new version These were both used by the US government and all parts carry NSN numbers. They used type A up until about 1990 until they came out with the type B. We refer to the type A as the early model And the type B as the late model. We can supply both early and late US GI chargers as well as any parts for the units. We have a supply of both of versions of this charger plus many parts. Please contact us for a price and delivery.