1960's Hoeppler Viscometer Viscosimeter w/ Original Wood Carrying Case + Extras

Description

Classic Vintage Viscometer (Viscosimeter) manufactured by the Fish-Schurman Corp of New Rochelle.
1967-1968 origin.
Beautiful condition, though i do not know how it works.
Includes many documents about operating the unit and calibration certificates, etc.
Nice wood carrying case with handle has a few scratches. See photos.
Viscometer locks back into place by a turn screw.
Weighs 16 lbs.
Questions? Please ask.