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 5930-01-158-4184
NSN 6145-00-156-4394
NSN 6135-01-411-3212
NSN 6110-01-111-8762
NSN 5975-01-393-3245
NSN 6145-01-026-9085
NSN 6240-01-369-0069
NSN 6685-00-723-8814
NSN 5990-01-407-6615
NSN 5990-01-073-8476
NSN 6620-01-352-5640
NSN 2925-01-588-3507