I have a single Gillette New Open Comb, so I have nothing to compare it against. I am trying to figure out if it is a short comb or a long comb. When I look at this picture, I am pretty sure that it is a "U.S. Long Comb New". My reasoning is that mine has the ridge on the bottom of the bottom plate, it says "MADE IN USA", and has a diamond shaped Gillette logo on the lower part of the plate. However, unlike the picture above, mine is in brass. Are the logo and the ridge the only way to tell a short comb from a long comb, or am I missing something?