This is in the alleyway behind the Macy's building. It's near other ghost signs, and close to a big, ugly 70's mural. I'd noticed the Shaftway (whatever that means) sign before, but didn't pay it much attention, because it didn't immediately meet the strictest criteria* for this blog.
It wasn't until yesterday when I happened to notice the painted awnings.
So: happy for finding something. Sad for not seeing it before.