N615FF 747-121(SF) "Tower Air Cargo"
One VERY old 747, the 3rd 747 off the production line, with its first flight in July 1969!!!. Delivered to Pan Am in 1970 as N732PA. Joined Evergreen International in 1991 as N475EV before joining Tower Air in 1994.
Interesting to note there are no photos of this one on airliners.net or jetphotos.