The search page on http://www.paintscratch.com/search.htm is nice. My truck has paint code 731K on the door post tag, and I have had problems figuring out what color this was - until I read this post, clicked through to paintscratch's site on a whim, and found their search feature, which I'd missed before. It turns out Galway Green had two paint codes, and most places, including paintscratch's calendar year listing for 1959, list only the other one.

That said, it came up dry looking for 725 smile (perhaps their data only goes back to 1957 too).