Know where this is? Take a guess and let us know in the comments.

Update, 14.07: Berkeleyside reader “ex elf” correctly guessed that this is the street number painted on the wall of 2405 Prospect Street. Congratulations to “ex elf”.

Photo: Sandy Friedland.

Tracey Taylor is co-founder of Berkeleyside and co-founder and editorial director of Cityside, the nonprofit parent to Berkeleyside and The Oaklandside. Before launching Berkeleyside, Tracey wrote for...