Very nice Bell Systems 22-page operation manual from 1968 - HOW TO OPERATE THE TELETYPEWRTER No. 33 TWX (ON TELETYPEWRITER EXCHANGE SERVICE) - with detailed instructions and a few diagrams and photographs. 5 7/8" x 9" in absolutely excellent condition. Document ID# - 999-300-105 Issue 2, April, 1968. The photos tell the story. Thanks for looking....enjoy!!