We saw what appeared to be a Toynbee Tile today. We were walking west across Geary from Union Square (looking for something to eat and to catch the MUNI 38 line to pick up the 28 north of Golden Gate Park) when we saw this. I can't remember where we saw it, and, stupidly, I didn't shoot a picture of the street sign or anything. I know that I was crossing from the north side of Geary to the south side when I saw this (meaning that it's oriented in the street with "up" being to the south) and that we were on the eastern side of the intersection when we crossed. It's in the first 7 blocks of Geary west of Union Square, because it's in my photo stream prior to photos outside of Mel's Drive-in at the corner of Geary and Van Ness.
Here's what we saw:
None of the Toynbee Tile lists that I looked at reference any San Francisco tiles. I'm too tired tonight to bother emailing anybody about this. For now, I'll just let the lazyweb mull over this one. Perhaps tomorrow I'll walk down Geary and see where it is (or, at the very least, look "drive" down Geary with Gooooogle Street View and see if I can see it).