made by "G.Hartner Ebingen" sold by "SECA" Pendulum system covered in a sealed case. The scale sort the eggs over there weight into the classes S-A-B-C-D-E. The case is sealed with a lead seal which is marked with a verification mark of Germany ( DR ). A lead plate show also the last calibration date ( 1967 ). The case contain a 50 gram weight on the top, which was in use to proof the correct weight before each weighing.