Similar to Cannon-Manning Vacuum (CMV, 9724-H50) series, but with graduated capillary instead of two timing bulbs.
Provided with certificate of calibration and instruction sheet.
Viscosity range, poise: 2400 - 52000
Approx. constant poise/second at 300mm Hg Bulb B: 128
Approx. constant poise/second at 300mm Hg Bulb C: 64
Approx. constant poise/second at 300mm Hg Bulb D: 40