Here is a stumper. I found this mixed among many Hallwood and Nelsonville Blocks in Harrrison West. It was an outlier in a paved sidewalk area. This is a design I have never seen before. My limited Brickology lore suggested this came from Haydenville or Nelsonville (as would the presence of peers of the era). Maybe this was a free sample that came with brick salesman long ago. Who knows. But if you do, post a comment.