Off to a good start -[ HMM ]-

Optical sound synchronization ID frames on 35mm SMPTE Universal Leader film. (16mm copies could be made from 35mm originals, hence the 16mm frame.) The 35mm frame was printed 20 frames ahead of the Picture Start frame; 16mm, 26 frames ahead. The marker orientation indicated the location of the sound reader: outboard for 35mm, inboard for 16mm.

Done