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|image=GR 874-MR Close-Up.jpg | |image=GR 874-MR Close-Up.jpg | ||
|caption=General Radio 874-MR Mixer Rectifier | |caption=General Radio 874-MR Mixer Rectifier | ||
|series=874 | |series=GR-874 | ||
|introduced=1951 | |introduced=1951 | ||
|discontinued=1973 | |discontinued=1973 |