SOLD Super Rare c. 1860s S.L Hills Double Sided "City Hall" Building BlocksThe best known (and highly coveted) blocks by S. L. Hill (NYC) are alphabet blocks from the 2nd half of the 19th century, some flat and double sided; others cubes, and the most striking of them incorporating the same rich red as these. Founded in the 1850s, Hill was the first American manufacturer to produce blocks in mass quantity, and in the 1860s expanded to include building blocks among its offerings, which I believe is the decade when these were