David Grimes Inc. and later Grimes Radio Eng. Co. Inc.; Grasmere, Staten Island, New York: - Trade names Inverse Duplex, New Yorker. In 1926 David Grimes became involved with Wall Street promoters and was associated with the David Grimes and Cameo Record Corporation. They spent 2 million dollars on advertising and subsequently in and David Grimes left the corporation. They did away with the inverse duplex system and converted sububsequent Viking Radios into TRF's but used the binocular coils. The Model 6D was a six tube set and the New Yorker was one of those also. The Radio Jobber said that in 1927 the company went into receivership and the assets were sold.