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 4140-00-712-8285
NSN 5855-00-010-2980
NSN 6685-01-067-0120
NSN 5935-01-584-1205
NSN 6135-01-504-4744
NSN 6240-00-573-7514
NSN 5985-01-227-5524
NSN 2925-01-014-0118
NSN 6645-01-556-0788
NSN 5915-00-004-7608
NSN 6645-01-054-3969
NSN 5895-00-296-8076