P.S. It's not a slab serif; it's a Didone...

Thanks for the heads-up nick!

After viewing the piece in situ, considering the fact that it's categorized under "Digitized" and looking at the artist's other work, I'd venture to say "not a font," but probably based on some hand-lettering guru's work. It reminds me a lot of Alphonso E. Tripp's work, but maybe not. If you check the friendsoftype feedback, you're not the only person who's dying to know...

It's not really a similar face, but Carousel lives in the same universe. The 5 much rounder but the caps have a similar feel.