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 5895-00-080-2003
NSN 6135-01-151-2705
NSN 5950-01-245-8545
NSN 5985-01-532-5629
NSN 6220-01-369-9015
NSN 6650-01-601-3775
NSN 6130-00-205-1714
NSN 6110-00-226-3148
NSN 5910-00-528-9714
NSN 6610-01-461-3850
NSN 5945-01-556-9616
NSN 6105-01-503-3974