A set of laboratory scales. Not used. The weights are inside in packing paper and grease. Weighing up to 100 grams. Gost 7328 4th class GOST 7328-73 STATE STANDARD OF THE USSR General purpose kettlebells must be made of six accuracy classes: 1, 2, 3, 4, 5 and 6. The scope of application of general-purpose scales of each accuracy class must correspond to the one indicated below. Class 4 — for technical analyses and weighing of medicines; The set is new. Wooden box. Manufacturer - Nizhny Tagil, USSR - 1980s..