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RCA (Grass Instruments) 5V4GA Full wave rectifier (1935) black plates d-getter
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Photostimulator, by Grass Instrument Co., Quincy, Massachusetts, USA, c. 1950-70
ALT ITEM: 19364 | SD9 B Square Pulse Stimulator
Grass-Instrument-S88-Square-Pulse-Stimulator-Metal
Grass Instruments 79D Polygraph Recorder
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Upgrade Your Grass Instruments Stimulators
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GRASS INSTRUMENTS S8 STIMULATOR MODEL S8 BR — Wazobia Enterprise
Children and teacher sitting on grass and playing musical instruments together. Kids enjoying outdoor music class. Daycare activities and musical education concept Stock-Vektorgrafik | Adobe Stock
Grass Instruments S88B Square Pulse Stimulator – Sunnking
