The patent for this bridge was filed on November 10th 1980, and granted on June 15th 1982. This was, of course, the Top Adjust tune-o-matic bridge, used on a small number of early eighties guitars, most notably the Victory MV and Explorer II models. The inventor was long-time Gibson employee Rendal Wall, who also designed the TP-6 tailpiece around the same time. He put a number of very useful features into this bridge - it is surprising that it was not more widely adopted on other Gibson models.
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