Ubbelohde viscometer 50-500mm²/s calibrated

Ubbelohde viscometer, DIN type with printed constant according to ISO/DIN 3105, DIN 51502, BS 188, KFT 60-100, No. IIa, inner diameter 1.69 mm, K 0.5, measuring range 50-500 mm²/s, calibrated, four-legged