Set of 10 Luftwaffe Relays in Box

Set of 10 Luftwaffe Relays in carton box (Siemens Bordnetzgerät Widerstandskasten 19-5304 A-3). Used for board weapons in Luftwaffe planes. The relays are maker marked by Siemens, the carton box is nicely LW marked with manufacturer's code 'hdc' indicating the 'Luftfahrtgerätewerk Hakenfelde GmbH' in Berlin-Spandau. The set is in mint and unissued condition!