461 Greener or Gibbs?


I have had this 461 number 2 round for about 20 years which has the headstamp ELEY G No 1 EXPRESS its in both Hoyem and Fleming and Hoyem states this incorrect headstamp was done to circumvent the Gibbs trademark , ( would ELEY produce a round with an incorrect hearstamp for this purpose ? ) but I do remember reading a few years ago that this round may have been for a Greener gun, has any new info come to light regarding this very interesting round , thanks Randy