GENERAL RIBBON CORPORATION, 1 RIBBON NYLON BLACK, 1/2" X 10 YARDS, FOR UNIVERSAL TYPEWRITER SPOOL, T2-77B
Royal Adler Typewriter Ribbon for Old Twin Spool Typewriters  Black Nylon Ribbon SC 20 with 2 inch diameter Fits the following Adler models: Academy,  Aristocrat, Arrow, Challenge Portable, Companion, Contessa, Dart, Factura, Futura, Ghost, Lark, Manual Portable, Mercury, Meteor, Parade, Portable, Princess 300, Quiet Deluxe, regal, Royalite Portable, Sabre, Sahara, Satellite, Satellite 2001, Signet, U 390, Zenith 21C, 21D, 200, 550, 560, 1828