About a hundred of these were built during WW2, and according to this site . . . caveat emptor . . , about 11 have been recently active, 4 of which in other countries.
Tilly was among a dozen of the DPC tugs built in the Bronx. Chris Roehrig, a former owner, sends along the next three photos from 1990s.
Here Chris and John Malik bask in fame after the tug races on 1993.
The photo below from Harry Thompson has appeared here once before, but I want to include it again.