Not sure about 473. This site had mention of 476 needing some attention and being down.
The #68 I saw in 1998 was in the D&S Museum. I asked the Museum attendant, the D&S owner's son, and he said it is numbered 68 because it was built in 1968. He said it came from an amusement park and didn't have anymore details to offer.
Does anyone have any info on the 20 ton shay in Colorado Springs, owned by Marc Lamoreaux? Info like gauge and where it came from?