Golf ball weight

Going through history, golf balls had quite irregular weights. While the feathery balls were less standarized the weights were becoming standardized with the beginning of the gutta percha balls. Nowadays, golf balls are ranking between 41-47 grams, including those being produced still in the 70ies. The average weight would be around 45gr.
One exception is the Cayman ball, constructed by Jack Nicklaus in the 80ies. This ball only weights half of the standard weight (approx. 20 gr.) to enable less distance for smaller golf courses.