2003 Air Jordan 1 Patent Red with Gold Swoosh
The red AJ1 was made for Hiroshi Fujiwara (for those keeping score, that's the H in HTM). There are several other created samples and prototypes, but I don't count those as being rarer than vintage prototypes. (Jumpmanst [Administrator of Niketalk.com]).

The "H" stands for Hiroshi Fujiwara, a 37 yo Tokyo DJ turned shoe designer/consultant for Nike. The "T" stands for Tinker Hatfield, VP for Design and Special Projects at Nike. The "M" stands for Mark Parker Nike Brand President. For details on hTm go to this webpage by Vintage kid: http://www.basket-ball.com/basketball-article-1077.html

Supposedly only 2 pairs exists. One belonging to the Nike Vault, and one belonging to some Japanese(?) guy that is apparently close to Nike. (shoemasta72 [Registered user of Niketalk.com]).

Hiroshi Fujiwara is a Japanese custom shoe designer for hTm. They release limited edition customs of Nikes in exclusive shops in Paris, London, Japan, and Hong Kong that sell like hot cakes. Some of hTm products can be viewed at this webpage http://www.conceptshop.com.hk/sneaker.html

Pic below was taken either in 2002 or 2003. The shoe looks lower than the original high-tops because they are 2003 retro customs made for Hiroshi.