For sale is an authentic, vintage Hewlett-Packard HP-12C Owner's Handbook and Problem-Solving Guide. This is the collectible March 1983 edition (Part No. 00012-90001, Rev. D), originally printed by HP's Corvallis Division in the U.S.A. The manual features its original plastic white spiral binding. It is completely intact with clean pages, free of any interior writing, highlighting, or missing pages. The covers show light vintage shelf wear and minimal corner rubbing as pictured. Perfect replacement manual for collectors, financial professionals, or retro tech enthusiasts. Comes from a smoke-free home. Fast shipping!