This ball is very rare as it is an experimental pre-release that was exclusively distributed to touring professionals (an altered version with an inscribed autograph of Johnny Petraglia was released to the public). The original owner, a relative, was a touring professional from the 70's through the 80's and received this brand new from the factory. This version is known as a bleeder: is clearly and actively sweats, releasing a fluid from the surface. This was a very sought-after quality at the time. Happy to answer any other questions!
The item "Vintage Brunswick BLOCK LETTER LT-48 Experimental Bowling Ball, NEW Bleeder" is in sale since Sunday, September 29, 2019. This item is in the category "Sporting Goods\Team Sports\Bowling\Balls". The seller is "zipzin" and is located in San Francisco, California. This item can be shipped worldwide.