I know that is was hand lettered, but I have seen this same style on other maps. It looks similar to copperplate, but I don't think that's it. Can anyone identify the source for these lettering styles?
The larger, serifed hand is definitely someone's hand-lettered version of a Copperplate (and very nicely rendered at that) and the sans serif looks like an italic variation of one of the bauhaus style hands - I've two near matches but neither is quite perfect.
Hope that helps.