None of The Pennsylvania Railroad's T1 passenger locomotives made it into preservation. Perhaps they were the wrong technological fix at the dawn of the diesel age, or perhaps the cash-strapped, formerly Standard Railroad of the World, couldn't maintain them properly.
There's a serious effort under way to build a new locomotive using the T1 plans, and the current fundraising effort is to finance two boiler courses. The nose, cab, and one driving axle are to hand, as is a coast-to-coast tender reclaimed from work train service.
Don't buy your tickets for the Admiral or Trail Blazer just yet, dear reader, the plans are to have a finished locomotive in 2030 or so.