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![](/images/191.jpg) | Grebe CR-13 & RORK Radio & Amp | Pictured here is the Grebe CR-13 & RORK. The CR-13 came out in 1923. It was a short-wave version of the CR-12 pictured elsewhere in this site. The RORK came out in 1920. It is a two stage audio amplifier. |
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