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 5965-01-474-1625
NSN 5855-00-138-2386
NSN 5965-00-798-3597
NSN 6620-00-239-6153
NSN 6105-01-509-6049
NSN 6320-00-593-0379
NSN 5985-01-634-0635
NSN 5930-00-155-5917
NSN 2925-01-225-0713
NSN 6135-00-546-6273
NSN 2925-01-282-3206
NSN 6645-00-008-3944