The Mets bullpen cart was the first of it's kind. Other teams had started the practice of driving the pitcher to the mound back in the fifties & the Los Angeles Dodgers were the first to use an actual golf cart. But the Mets were the first to put a team cap /helmet on the top of the vehicle.
The seats were white cushioned, designed to look like bases & the floor area was green representing grass on the baseball field.
The front had two bats supporting the Mets cap / helmet which sat atop as the roof, complete with the Mets orange NY logo on it, classic stuff!
In 2015 the cart was auctioned off by Sotheby's, expecting to go for $25,000 range it sold for an Amazing $112,500.
Over the last two years it seems the bullpen cart is making a comeback on the field in MLB.