D8 cats

I found a pair of D8 cats and was wondering if anyone could tell me the year of them. One serial no. is 8R482 and the other is a 1H4217 . I'm trying to figure out how old they are and if they are worth looking at. What hp rating are they, Both run and look good. Any info would be helpful! Thanks Doug

8r482 = 1942

1h4217 = 1939

Thanks for the info gwhdiesel75. I think they are a little too old for me for using but if someone is interested in them let know they both run, one has a newer engine in it with only 1500 hrs and the other only has 400 hrs on a brand new set of rails. the gentleman wants 3000.00 ea one. Thanks Doug

Too bad I don't have space for a kitty that big, let alone 2 of them!