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 6135-01-557-9656
NSN 6135-01-142-6456
NSN 5975-01-510-4355
NSN 4140-00-188-3800
NSN 4140-01-590-0887
NSN 5945-01-357-0399
NSN 6110-01-369-5561
NSN 5996-00-553-6477
NSN 5920-00-579-8434
NSN 5935-01-144-1147
NSN 7035-01-210-5111
NSN 5990-00-185-5888