As differentiated by serial no. 6610a4096a1
An instrument for measuring the rate of flow of a fluid through a pipeline. This measurement is indicated on a graduated scale either by means of a float confined in a tube, or pointer connected to a vane, or piston and spring or the like. Excludes meter, fluid flow indicating, differential pressure; meter, fluid flow indicating, electromagnetic; and meter, fluid flow indicating, ultrasonic.
NSN 6130-01-029-3601
NSN 6645-00-787-2673
NSN 5920-01-582-4203
NSN 5905-00-035-8981
NSN 6650-00-221-7119
NSN 5960-00-099-9790
NSN 5998-01-536-4156
NSN 5855-01-229-3864
NSN 4140-00-679-9512
NSN 5945-01-481-3005
NSN 6685-01-515-8743
NSN 6135-01-231-4809