These used to have innovation universal fixtures along with the floor indicator identical to the glass elevator. I don't know what the name of the indicator used to be, but the original floor passing chime is better than the current one.
Here they are pre-mod. Looks like they originally had Innovation Universal or Monitor PA, hard to tell. I think they actually might have been Monitor because of the floor passing chime and indicator. Still doesn't tell me if they were originally Schindler or Montgomery though. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-tEITMQ2yM_M.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-MrAt1hjHOmU.html