3847 Rhoda Avenue
This ungainly mark was used from 1911 to 1933, at least. After a hundred years, this one’s looking pretty beat.
1913 – Oak. Concrete T&M Co.
9 December 2013J. S. Mattos Concrete Co.
8 December 2013
4239 Coolidge Avenue
This differs from my previous examples in that the initials “J.S.” are closely spaced. Perhaps Mattos had two stamps.
2007 – Raven Berndt
7 December 2013
4006 Laguna Avenue
Heartfelt but indeterminate. Marks from 2007 are exceptionally rare, so I’ll take this whatever it means.
2000 – K. W.
6 December 2013
3311 Loma Vista Way
“K. W.” was surely an amateur.
1954 – A. J. Ferrero
5 December 2013
3546 Mangels Avenue
1942 – W. H. Wisheropp Co.
4 December 2013
4235 Laguna Avenue
The date is clearer in person than it appears in this photo.
1942 – P. Barale
3 December 2013
3303 Octavia Street
Oakland’s Octavia is nothing like San Francisco’s. This P. Barale mark is unusually clear, so you can see the stumps of the characters “& Co.” that he filed off many years before.
Oakland Underfoot 