This radio is internally very similar to my Drake SSR-1. Research indicates this receiver was manufactured in Japan by Seiwa around 1977. It appears to similar to the Standard C6500, the Lowe SRX-30 as well as the Drake SSR-1. It is quite sensitve but suffers from many "birdies". Frequency coverage is: 500 Khz-30 Mhz. The Century 21 was apparently sold in the German market.
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