I just looked at the photo. It is N603RC, an RB211 powered ex-Republic 757-2S7. The aircraft was operated for a while in that hybrid scheme. The aircraft currently flies as N903AW with America West. It is msn23323, and was the 80th 757 off of the line, built in 1985. NW operated it from the time of the merger until June 1987, when it was returned to Boeing Capital Corp., and then passed on to the new lesee, HP.