Stamped 'T. TILESTON BOSTON HARRISON AVENUE'. Steep pitch iron. Tileston often made more unusual and special purpose planes. Note the 1 1/4" x 3/32" sliver off the front (easily repaired) and the 'wear' on the left side from use. I don't remember the technical name for this cut...
**All edge tools may need to be sharpened/honed before use**