Description

Model 500 Diver Held Sonar product data (3 copies); Doppler Flow Meter Model TBS product data (3 copies); Long-Life Beacon Model 209A and 209B product data (3 copies); Model 238 Dual-Frequency Pinger product data (3 copies); Model 501 Sonar Transducer product data (3 copies); Model 509S Underwater Acoustic Switch product data (3 copies); Model 512 Underwater Acoustic Receiving System product data (3 copies); Miscellaneous Molded Products product data (3 copies); Model 522 Broad Band/Narrow Band Sonar Receiver product data (3 copies); Model 522 Swimmer Activated Distress Pinger product data (3 copies); Model 537 Adjustable Pulse Tone Pinger product data (3 copies); Model 538 Vessel Mounted Sonar product data (5 copies); Model 570 Deep Submergence, Pulse type, Hydro-Beacon product data (3 copies); Model 606 General Purpose Pinger product data; Ultrasonic Listener product data (3 copies); Model 610 Mine Pinger product data (3 copies); Model 615 Instrumentation Pinger product data (3 copies); Model 624 Acoustic Probe product data (3 copies); Letter to M. Klein from John Feighan, Marketing Manager dated 7/15/1969; Model 605 Missile Pinger product data (2 copies); Model 606 A General Purpose Pinger product data (2 copies); Letter to M. Klein from Tony S. Akra dated 10/4/1979; Letter to M. Klein from John Feighan dated 3/10/1970; Model 552 Environment Indicators product data; Model 573 Portable, Directional, Deckside Scanning Sonar Set product data; Model 626 Pinger-Swimmer Activated product data; Underwater Sound/Search Systems tri-fold brochure