THE CLUB APPEARS TO BE A PIECE OF RATTAN WHICH TIED ITS SELF IN A KNOT NATURALLY OR PERHAPS WAS DONE INTENTIONALLY AND THEN HARVESTED WHEN IT WAS THE PROPER SIZE. THE VINE CAN GROW RAPIDLY SO EITHER IS A POSSIBILITY. IT IS EVEN POSSIBLE TO INSERT A ROCK AND LET THE VINE GROW AROUND IT TO MAKE A CLUB. GOOD OLD EXAMPLE OF A PHILIPPINE CLUB AT LAST

. IN MY EXPERIENCE RATTAN IS NOT VERY HEAVY OR HARD THOUGH SO I WOULD SUSPECT THERE WERE OTHER SORTS OF WAR CLUB MADE TOO.