Can you identify the foreign license plate in the photo for me? I put it next to a New Hampshire license plate for size comparison.?

Might be from St Martin in the Caribbean. Early ones (about 1940 - 1960) were stencilled or hand painted like that.

Don't recognise it. The vertically arranged letters are unusual: and so is the white lettering on a black background which was the former standard for British plates until the 1970's, but very little used these days. However British plates never used vertically arranged letters.

Serbia and India have used vertical letters in the past, and in the USA I think Maryland and Indiana do.

It might be an obsolete Indian one, but that is just a guess.

Here, knock yourself out: http://www.worldlicenseplates.com/ If you figure it out in the next year, let us know. It looks very similar to some license plates I've seen in East Africa, particularly Somalia. Could also be WWII military as it is in the style of a spray stencil.

That isn't an official license plate. No country would print their plates so badly.