Can I assume this restoration is complete? I ran across a news item from about a year ago (June 28, 2013) about such a door, including the text:[INDENT]
Pictures of the United Bank of El Paso Del Norte’s Downtown location,
including the 25-ton vault door from the 1870s that had remained
undiscovered for nearly half a century. The antique behemoth was housed
in the basement of the now demolished Southwest National Bank in
downtown El Paso before the building was torn down in the mid ‘70s. The
space was then converted to a parking garage.[/INDENT]
The pictures look like the same door, and a very nice display for the bank. See http://www.kvia.com/news/20767240 for the article.

Though not stated in the article, this is probably 401 East Main Street in El Paso.