This sale is for the Owner's Manual for the HP 48 Series Scientific Expandable Calculator which were the 48S and 48SX models only in 1991 (before the 48G/GX series).  It was printed in the USA.  This is Edition 1 dated November 1991.  The HP part number of the Owner's manual is 00048-90091 and has 882 pages.  This manual is in very good condition, binding is still firmly holding all pages.  Flipping through a couple of times, I didn't notice any writing or markings inside and I believe all pages are present based on condition (sorry, no time to check all 882 pages individually).  The original first-page mail in card is still present and in perfect condition.  This book weighs in at just slightly over 2 pounds.  All pictures are of the actual Owner's Manual you will receive.

About the 1991 HP 48 Manual:  When originally released, the 48SX had a two-volume spiral bound set of manuals.  The 1991 Edition of the HP 48 Owner's Manual combined the two volumes into a single paper back bound version of 882 pages which included combined information for both the 48S and 48SX calculators.  This included a 132-page section on programming.  The User's Guide released in 1993 with the 48G and 48GX only contained a 21-page introduction to programming with the recommendation to obtain the Advanced User's Reference book for more comprehensive information on programming.