The H.-S. on this coal chute cover stands for Hoffmann & Schuback, an iron foundry whose history is found at Hoffmann & Schuback in the foundry marks section.
A coal chute cover marked "John Schuback, 123-133 Horatio St" is found at John Schuback in the manholes section.
Copyright (c) 2014 Walter Grutchfield