Flat top, huh? Haven't seen any around Los Angeles. There were still a few 1SOBs around when I left Otis in 1992, but not many-any of these "flatops". We had a lot of 10,20,and 30 UCLs, 260 VIPS, basically 60s and 70s stuff. Had some MRSs, 401s, and 411s.
However, I did have the opportunity to run an old Otis elevator with a carswitch into the overhead!