Photo and specs courtesy of bowling.com. Reproduced with credit to the maker.
How it moves
Arcing turn (symmetric core). Dotted is skid, then the turn, then the roll into the pocket. Estimated from the coverstock, finish, core, and differential for a right-handed bowler with medium revs on a house shot. Lane conditions, speed, and layout move all of this.
How much the ball wants to hook, 1 (straight, a spare ball) to 10 (the strongest oil-eaters). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.
Coverstock
S73 Pearl
Reactive pearl
Core
Clockwork Symmetric
Factory finish
4000 Grit
Color
Purple/Silver
Released
2015-10-01
USBC
Approved 2015-09-01
Weights and specs
Weight
RG
Differential
Int. diff
15 lb
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Surface
Coarse grit
Coarse and fine
Fine grit or polish
4000 Grit. Skims the oil and saves its energy for the dry part of the lane: longer skid, later and sharper hook. Polished and pearl balls. Surface changes over games, and a pro shop can take any ball either way with a pad.
Balls like this
Same coverstock and core type; the closest company for this ball in a bag.
