What a great present I had from my friend Diane:
It measures 30" high and is made from heavy wood from which the paint is peeling, and it comes from the recently demolished Goodmans building on Bayshore Boulevard in San Francisco. Diane managed to get most of the letters which spelled "BUILDING MATERIALS" through friendly and persistent negotiation with the demolition contractor. Unfortunately she didn't manage to get the M (for Mackey) but the N is just as good. It now lives in my studio. Thanks Diane!