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 6240-01-069-4711
NSN 5985-00-919-5525
NSN 5835-01-654-4570
NSN 5855-01-290-3248
NSN 5835-01-422-7393
NSN 5990-01-164-8673
NSN 5925-00-813-6810
NSN 6105-01-604-8621
NSN 6620-00-479-9425
NSN 6145-01-586-4679
NSN 5915-01-398-9831
NSN 5915-01-425-0257