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 5985-00-426-8479
NSN 6610-01-464-3037
NSN 4140-00-300-8111
NSN 5905-01-032-3409
NSN 6650-00-253-9195
NSN 5920-01-177-2284
NSN 6650-00-707-1417
NSN 5920-00-269-6178
NSN 6110-01-275-9653
NSN 6240-00-451-8587
NSN 5998-00-816-9752
NSN 5905-00-584-8085