We present the collection of magnetic field absolute measurements performed by early soviet magnetic survey missions Kosmos-49 (1964) and Kosmos-321 (1970). Totally 17300 measured values are available for Kosmos-49 mission, covering homogeneously 75% of the Earth's surface between 49° north and south latitude. About 5000 measured values are available for Kosmos-321 mission, covering homogeneously 94% of the Earth's surface between 71° north and south latitude. Both satellites had two measurement devices. The data from Kosmos-312 derives from the device that provided the stronger signal during the time of measurement. In case of Kosmos-49 the devices were switched on and off regularly, resulting in the two herein presented data tables for this mission.