1042 63rd Street
Here’s another example of the mysterious mark I found on Alcatraz earlier this year. Now it’s revealed as a unique crescent design, but I couldn’t decipher the name until I found “Robt H” Hahn in the directory. He was listed that year as living at 3043 Grove Street (now MLK Way).
It appears that the R and the N are reversed. Perhaps a better example will turn up in Berkeley.
Oakland Underfoot 
21 November 2020 at 2:13 pm
There is one in Berkeley at 1616 Josephine. While not much clearer, it looks like “H.E. HAHN” (1906)
21 November 2020 at 3:56 pm
Hmm, the 1905 (but not the 1906) directory lists an M. Hahn, “cement worker.”
23 November 2020 at 6:44 pm
I could be convinced. My photo is inconclusive. Definitely not an “I” per your older post.
I’ve been hunting and documenting Berkeley sidewalks since September. Your blog has been a great resource!