Authentic Soviet-era pH meter EV-74 (?? -74) – a professional laboratory-grade instrument designed to measure pH levels in aqueous solutions. A true piece of Cold War scientific heritage. Condition : New Old Stock (NOS) – device is unused, still under factory seals. Origin : USSR (Soviet Union), 1980s Type : Analog laboratory pH meter, designed for precise measurements in scientific, medical, or industrial labs. Collector’s item : Perfect for collectors of vintage lab equipment, museum displays, film props, or restoration projects. Looks impressive on display thanks to its rugged industrial Soviet design. Note : Not tested due to preserved factory condition.