SOLOMON ISLANDS, THE FLANGED TYPE HEAD HAS BEEN SAID TO HAVE COME FROM RENNEL ISLAND. I AM NOT SURE WHEN THIS TYPE CLUB CAME INTO USE BUT DO HAVE SOME EXAMPLES THAT ARE PRE WW2. THEY ARE STILL BEING MADE AND THE NEWER ONES OFTEN HAVE SHELL INLAY AND NICE WOVEN CORD WITH TRADITIONAL PATTERNS. THE ONES I HAVE SEEN ARE USUALLY SMALL AND WERE EITHER FOR THROWING OR FIGHTING CLOSE IN. THE CARVERS IN THE SOLOMON ISLANDS DO GOOD WORK AND SELL QUITE A LOT TO TOURISTS, THEIR FIGURAL BOWLS AND TIKI TYPE HEADS AS WELL AS THE CLUBS ARE NICE.
YOUR EXAMPLE APPEARS TO BE A STAFF OR CANE RATHER THAN A CLUB AND DUE TO THE LACK OF SHELL INLAY,PATINA AND THE USE OF LIME INLAY MAY BE BEFORE WW2, NICE ITEM