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 5920-01-182-1545
NSN 5996-01-167-3922
NSN 6620-00-244-0965
NSN 6240-00-578-6820
NSN 6110-01-316-6414
NSN 6105-00-936-2130
NSN 6110-01-434-1486
NSN 6105-01-098-8381
NSN 5960-01-019-4920
NSN 5835-01-249-4529
NSN 5998-01-218-8651
NSN 5990-01-485-0260