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 6110-01-633-9660
NSN 5990-01-133-0351
NSN 5999-00-589-7849
NSN 6220-01-461-2910
NSN 6240-00-968-9274
NSN 6645-00-539-1705
NSN 6650-01-467-2355
NSN 5996-01-178-7734
NSN 5990-00-522-3425
NSN 6645-01-379-5391
NSN 6620-01-130-5700
NSN 5990-00-728-8248