Here is a Braunsdorf-Mueller Socket Set.
Ratchet is about 10 1/2" OAL with 1/2" square drive.
Ten pressed, or formed, steel sockets, plus a screwdriver bit.
May be a complete set as the sockets range from 7/16 to 1 1/16 by 16ths while missing the 15/16.
To state the obvious, they seem to be automobile intended as there are no USS sizes, such as 25/32, and the wall thickness limits the strength anyway. Wall varies from about .090 on the smallest to about .115 on the largest.
The ratchet seems to function and the various pieces have about 50% black remaining. (Enamel? or Jappaning?)
The sockets are unmarked except for the size, so I am only assuming that they are original to this ratchet.
Anyone know anything about these?