That's right, my mistake, the low-numbered Gibbs cars were not
converted. Our Deckroof 3662 at Branford Shore Line Trolley Museum
still has the manual door control boxes at the ends of the car.
A-Bs were not delivered with MUDC but the door controls were
inside the car (as I'm sure you know) and it was a simple matter
of replacing the conductor's button panel.
The 1924 order of Lo-Vs was delivered with MUDC. The 1915-1917
Lo-V orders were not but all of the doors were electropneumatically
operated by that point (no manual levers).