This unused ball features its own unique Trapezoid/Triangle "Trellis" pattern designed to form six poles on the ball. Two are stamped with a red letter O. An "O" ball is not listed in McGimpsey's golf ball reference books.
As can be seen in the magnified images of this ball, there are cracks in its enamel paint. This sometimes happens because the paint is applied too thickly. So the shrinkage that occurs when curing is beyond its elasticity. And it cracks. Of course the age of the paint as well as the environment—UV exposure, humidity, heat, cold, etc—can play a part as well. Even so, when viewed in real life, the cracks in the paint are there but not nearly as prominent as they are in these highly magnified pictures. When displayed, this extremely rare ball looks great!
This ball is middle row right in the group shot in the accompanying images.