Offered here is a dozen PING half black / half white golf balls brand new in the box. Not only does PING no longer make golf balls, it is unlikely that anyone will make two-color balls ever again, and certainly not in the multitude of color combinations produced by PING.
The covers of PING balls were solid in color and not painted. It required maintaining precise temperatures and pressures to create these colored covers and not get any bleed-over between the two colors. The solid rubber cores in the center of these wound balls were tumbled frozen and stored at 120 degrees below zero to maintain their round shape. (Karsten spent some of his time working in Cryogenics as an engineer for GE.) To learn more about the extensive engineering that went into these balls, see "And The Putter Went PING" 162-169.