1971 Topps Larry Brown Baseball Card #539, CSG NM/Mint 8 1971 Topps Larry Brown Baseball Card #539, CSG NM/Mint 8. Its hard to find these black bordered beauties in high grade, being a hard to find card in high grade makes it that much sweeter. The subgrades on the card are Centering 9, Corners 8.5, Edges 8, and Surface 8. CSG is part of the Certified Collectibles Group that has long been the standard in the coin and comic grading world, they have now added some of the top sports card graders to their company to provide a much needed addition to the industry. Their holders are the best in the industry, solid construction and clear view to fully enjoy your trading card.