Herb, several manufacturers have either no code, or use the same notching for all their films. And then there are the rebranded films, which are notched according to whatever the machinery was set to do at the factory that cut the master rolls, which is *not* the one that coated and rolled them (generally). The only thing you can be really sure of is that if the notch is at the right end of the upper edge of the film, the emulsion is facing you...
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