925 63rd Street
1904 – Contra Costa Construction Co.
29 May 20111901 – Peterson & Adler
28 May 2011
969 63rd Street
This is the fourth 1901 mark I’ve found from these guys, and the best preserved.
1946 – Berkeley Cement
27 May 2011
6616 Whitney Street
There were two marks on this driveway, the other with the year upside down. I came home and saw that my previous example also had an upside-down date, so this is the right one and the earlier one is the variant.
1942 – J. Anderson
26 May 2011
6534 Tremont Street
J. Anderson marks are not rare, but they have a short date range that now extends from 1937 to 1942.
1940 – Aaron Dahlquist
25 May 2011
575 Haddon Road
1940 – Albany Concrete Co.
24 May 2011
4397 Detroit Avenue
1940 – M. Medis
23 May 2011
4338 Detroit Avenue
