3141 San Pablo Avenue
Most Dahlquist stamps from this period include the month. Maybe he was in a hurry and didn’t add that part here.
1920 – Aaron Dahlquist
5 October 20251909 – Esterly Con. Co.
3 October 2025
2231 Tenth Street, Berkeley
There are two stamps here, both with the same barely readable date.
1906 – Contra Costa Construction Co.
1 October 2025
2321 Ninth Street, Berkeley
My example from Oakland is pretty poor; this one is pretty fine.
1906 – Blake & Bilger
29 September 2025
2394 Ninth Street, Berkeley
This is as good an impression as you’ll ever get. The stretch of concrete here, some 120 years old, is worthy of “heritage sidewalk” designation.
2025 – Cooper Construction & Engineering
30 August 2025
1960 Adeline Street
The stamp isn’t dated, but the work was still wet.
Cooper Construction & Engineering is a small family firm headquartered in Oakland.
Mueller Co.
6 August 2025
36th Avenue at Foothill Boulevard
The Mueller Company traces its history back to 1857, but its brass business dates from 1927.
Out of town: Modesto, California
4 July 2025
I was just stopping for lunch in the older part of town and was pleased to find this. Sears & Baker was mentioned in the local papers from 1905 to 1933.
Oakland Underfoot 