Re: If you want to get (a little more) technical

The tender frame now behind 483 was the one she carried when 483 was wrecked east of Durango in 1958. The frame was bent over the rear bolster causing the end sill to droop at an angle. A large piece of wedge-shaped steel had to be used as a shim to straighten out the coupler, but the coupler height was just barely legal. The D&S chose to use 482's tender frame. 483's tank was repaired after the wreck and had a couple of seams welded up to make it water tight again. After the wreck, the tank had a twist to it with the top right corner clearly not lining up with the engine cab. As 483's tank still held water and 482's tender very obviously didn't, the 483's tank went with 482's frame.

Russ is correct in that all the 480's tender tanks and frames were stamped with Baldwin's class and shop number, allowing one to trace which engine the tender originally rode behind.