A well-presented example of the M35 Beaded Helmet – ET66, manufactured by ET and stamped ET66, with lot number 5064. This civil defense helmet retains much of its original paint 

The steel shell is finished in black paint, a standard color for fire brigades and civil services. White alphanumeric markings (“ASENO-248”, “G.S.”) are painted on the sides and rear, indicating assignment to a specific unit or facility.

The shell is clearly stamped “ET66” (Eisenhüttenwerke Thale, size 66) and “5064” (lot number).