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 6220-01-388-3788
NSN 6645-01-348-7435
NSN 6650-00-089-9423
NSN 5895-01-209-2617
NSN 6105-00-588-7513
NSN 5895-01-411-7064
NSN 5990-01-215-5997
NSN 6145-01-234-3685
NSN 6620-01-207-0667
NSN 5925-01-299-7251
NSN 5855-01-453-6384
NSN 6220-01-474-9393