Inside of belt is positive drive, outside of belt has pins to drive paper, used on data printer b-140
A flat internally toothed belt or a round belt with protuding pins, designed to engage with corresponding teeth or corresponding grooves on the sprockets over which they run.
NSN 6220-00-782-2058
NSN 6240-00-911-4832
NSN 5975-01-498-8029
NSN 5930-01-357-2301
NSN 6110-00-245-1814
NSN 5905-00-816-2489
NSN 5895-01-055-4873
NSN 6620-01-466-4436
NSN 5920-01-446-4524
NSN 6320-00-725-0754
NSN 6220-00-702-8263
NSN 7035-01-165-0234