Second and Columbia, c. July 1914
The clock in the foreground disappeared sometime after 1924. There was another clock just like it that arrived in 1908, the same year as this. In parentheses I've left my mistaken history of the clock:
This photo supplied 3 of the 500 entries (as of 2010) in my database of Seattle street clock sightings. In the far distance is the Stacy Shown street clock, before he moved it in front of the Smith Tower next door and added on some fancy lights. Check out comments for that clock today.
Back behind the pocket watch clock is another which I'm still developing a lineage for.
(Five years later I finally published the database, figshare.com/articles/Seattle_Street_Clock_Database/1455478)
This was an undated postcard. But the street construction on 2nd pins this to 1914. And the decorations on the lamp posts were for the Golden Potlatch, which ran in July. By August the decorations were down already.