I don't remember which ones exactly, but some of the N53XUS and N54XUS planes were in transatlantic service during their NW days, shortly before the merger with Delta. They flew low-intensity routes like DTW-DUS, which were go-to routes for inexpensive award and revenue fares across the pond. I remember those flights quite fondly! Also, some of these planes were based in Japan, and flew low-density routes to PUS, TPE, SPN and places like that. If they could only talk and tell their story .