7404-71 A.R. ROBERTSON bill posting hammer. Patented in 1902 by Arthur Robertson of Somerville, MA, and described simply as a magnetic tack hammer, these were marketed as being particularly well suited for posting handbills in hard to reach locations. Sold in multiple parts that could be screwed together, this is an example of the uncommon two-part version. Wood fine, light corrosion on metal parts. Good+ (ECC201) 60-120