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 5990-00-719-4947
NSN 5935-01-443-4192
NSN 5910-01-285-5602
NSN 5930-01-458-2354
NSN 6240-01-536-1767
NSN 6645-01-414-6125
NSN 6110-01-625-7268
NSN 7035-01-421-4446
NSN 5975-00-326-9075
NSN 6240-00-810-3774
NSN 6610-01-367-1640
NSN 6620-01-568-7140