The Hammer Gas Mask core was release in 2003 inside the Big Blue Solid Bowling Ball. Over 16 years later, this core is still being produced. I thought I would look at all the bowling balls that were release in the United States marketplace since its birth.
Widow Spare (Blue/Orange/Smoke)
That is 27 bowling balls released in the US Market with the Gas Mask core. This number is probably double if you add in international bowling balls.
