Vintage 1964 Quinto 3M Bookshelf Game Math Strategy Board Game Complete

Vintage 1964 Quinto board game by 3M (Minnesota Mining and Manufacturing Company) from the Bookshelf Games series. This math-based strategy game challenges players to create rows of tiles that sum to multiples of five, blending crossword-style placement with numerical skill. The set includes the original marble-patterned folding board, black number tiles, and a score sheet pad. The instructions are conveniently printed on the inside of the box lid. A classic addition for collectors of mid-century tabletop games or educational math puzzles. Note: Box shows shelf wear and some handwriting on the inner lid as pictured. There are 80 tiles