A Balza. Save Share Ask Question Forbes and Clark Collections Visualizing Maritime History Project Save Share Ask Question Engraving of a raft called a balza (or balsa). The raft is constructed of logs from balsa trees. Classification vessel type depiction Date Made 1800-01-02 Legal Status PERMANENT COLLECTION Major Collection Hart Nautical Maker Hall; Darton, William; Harvey, Joseph Materials ink; paper Measurements 6 1/4 in x 9 in Place Made England: London