Senility corrected. Greenfield..Greenleaf…(Geez, don’t get old). He’s buried almost next to my parents. The tables obviously changed, but it’s likely the antique fountain counter I haunted there was his father’s.
Wish I knew what brand/model was the mud ball I knocked off the table (late 50s/room where R. Greenleaf learned) that lost it‘s clay cover when it hit a spittoon. Remaining core looked like concrete.
These were Brunswick Compo-Ivory, most likely, and were contemptuously called "shell balls" by competitors. The numbers were pencil-thin and therefore look more antique than other types.
The pre-dart Ivorylene balls had a major flaw - the striped balls would come apart. The center (striped portion) was not mechanically connected to the sides. Their scarcity is probably due to that. For the solid #1-8 balls, it can be very difficult to tell the difference between Ivorylene, Empire, and even some Compo-Ivory balls. (Most Compos had the pencil-thin number font, but the number's line thickness varied dramatically even within a matched set.)