493 and 494 because...

...well the 495 had a large extention on the back of her coal bunker which would have been distinguishable in that picture and it appears that the side mounted tender light doesn't have a visor which would make it the 493. The 490 the other K-37 at this time with a side mounted tender light is easily identified by it's high sides on it's coal bunker--it was the only one with that configuration until the 497 took it in 1960-61. The second tender is the 494--you can make the number out on the side of the cab. And the third engine is the 464--no I'm not really drinking.

William
aka drgwk37