Original Faball Purple Hammer TEST BALL 16 lb. This ball is a preproduction test ball of the original Purple Hammer from the early 90’s. Going by the serial number and information attained from sources in the industry, this ball was in the 4th series of tests and was the 9th ball on production for that line. Very rare and a unique part of Hammer bowling history. If you have any questions, please feel free to ask. Thank you for looking!