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 6145-00-128-8698
NSN 5930-01-039-4728
NSN 5960-01-328-8248
NSN 6320-01-547-9877
NSN 5990-01-432-4984
NSN 5935-01-558-5675
NSN 5998-01-534-2321
NSN 5998-01-082-6375
NSN 5910-01-498-3719
NSN 5985-01-020-8259
NSN 5990-01-351-4621
NSN 5985-01-445-6667