Not just two engines, but two cabooses! Very nice.
It appears that Edaville 554 is a reasonably good facsimile of the original SR&RL 554, a somewhat mysterious car that was destroyed by fire in 1926 and of which there are very few photographs, though it's known to have been of the same basic design as 551 and 552. In volume 3 of his recent series of SR&RL equipment books, Jerry DeVos theorizes that 554 may have originated as one of the B&B excursion cars, either B or C, rebuilt by the SRRR at some point prior to the 1908 consolidation.