I just sold one of mine to a friend. He's shot 700+ everytime with it, including a 300, and 269 last night with it. It's pin under ring, cg stacked, weight hole.
Mine I still have is pin over and right of ring, cg stacked, weight hole. Great ball for broken down lanes, or played straighter on a fresh/heavier shot. It's and awesome ball.
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Hammer-Lane #1-Ebonite-Brunswick