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 5920-01-482-2424
NSN 5996-01-443-5617
NSN 5965-00-529-0602
NSN 5835-01-384-3206
NSN 5975-01-081-8667
NSN 4140-00-225-8586
NSN 6110-00-899-0164
NSN 5985-01-604-3963
NSN 5915-01-145-5340
NSN 5950-01-457-7492
NSN 6320-00-908-6841
NSN 5835-01-229-6964