EK2 Otto Schickle non-magnetic with LDO number L/15 the inner zinc core 

EK2 Otto Schickle non-magnetic with LDO number L/15 the inner zinc core

With non-magnetic inner zinc cores, it often happens that the paint separates from the surface over time, because you did not use a primer on all pieces the maker.

The mm the regular 1 type mm / small marked mark type/

the condition see on the pictures