I left my mailbox in San Francisco

So, I'm in San Francisco, and I'm riding on a cable car on my way to see the Golden Gate Bridge. And the cable car only goes so far -- then I have to get off and get on a real bus to go out to the bridge.

So the cable car gets to the end of the line, near Fisherman's Wharf, and I step off the cable car and start to walk down the street ... And there it was.

A Jebco mailbox. Painted olive drab green, no less -- a Postal Service relay mail box, now obsolete in some areas (but still in use in others as recently as 2003, according to posters on that online forum).

I'm not sure if this one was still being used by the Post Office in San Fran or not. The date-stamp on the box is 1986.