Kruporushka, Milleterka SO-124A USSR, Donetsk region.

Melotherka SO-124A. New, never used. Warehouse storage.
Grinder, intended for grinding natural lumpy chalk, used for the preparation of chalk paints, putties, fillers and chalk paste used in painting and glass work, for grinding soft rocks (slag, lime), dry clay materials, as well as grinding different types of fodder.

Technical characteristics of СО–124А:
Productivity, not less — 450 kg/hour;
Grinding fineness — the residue on the sieve is 0.2 mm, no more than 6%;(//tractor-service.com)
The size of the pieces at the entrance is no more than 50 mm;
The rated power of the electric motor is 5.5 kW;
Electric motor power supply — 380 V, 3-phase, 50 Hz;
Overall dimensions — 730×315×535 mm;
Mass, no more than 110 kg.

There is also a device for the operation of this engine at 220 V.