GF-A or SF-B - Goldfish (Yellow Coach Dog)? or Silverfish (Yellow Coach Dog)?

The box marked GF-A contained a Chugger Spook in Yellow Coach Dog with a gold reflector insert with a white eye. The other box had no lure. These boxes date to the late 1960's. There is no catalogued listing for either of these codes. It is suggested that these boxes were for 'test' or 'prototype' lures and likely both are for the Chugger Spook in Yellow Coach Dog, one of which had the gold reflector and the other the silver reflector insert.

(Pictures courtesy of Jim Viviano!)