Vintage NAVSHIPS 91148 Oscilloscope TS-239A/UP Instruction Book 1948 Navy Manual Regular fit characteristic of the heavy rifle

characteristic of the heavy rifle version

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Sights: Correct ladder rear sight

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Vintage NAVSHIPS 91148 Oscilloscope TS-239A/UP Instruction Book 1948 Navy Manual Regular fit characteristic of the heavy rifleOriginal U. S. Navy Bureau of Ships (BuShips) Instruction Book for Oscilloscope TS 239A UP, published by Lavoie Laboratories for the Navy Department. This authentic post WWII technical manual is identified as NAVSHIPS 91148 and was approved on 15 December 1948. The manual provides operating and technical information for the TS 239A UP oscilloscope, an important piece of electronic test equipment used in naval communications, radar, and electronics