Vintage Mexican

My husband has been purchasing these beautiful paintings of Mexican/Latin American city/landscapes from ebay (search for "Latin American watercolor" and you'll see it, first one, I'm not sure if this is by the same painter because it's difficult to distinguish the signature) by someone who signs them "Max.V" or maybe it's "Mex.V," I don't know, it's hard to tell. They are vintage, I'm no art guru, but the paintings look like they would've been done somewhere between the 1930-1950's. Anyways, it seems that most paintings are purchased in estate/demolition sales. I would like to find out a little more information on the artist if at all possible. I really do hope someone out there knows something.