The original manual for the HP16C (purch. Apr. 1984) is 170 x 117 mm (not counting the spiral binding), their part number "00016-900001 Rev. C English" amd "Printed in U.S.A. 9/83" on the back cover. The calculator has "USA 2417A85315" stamped on one edge. Works fine, never replaced the battery, but it is only lightly used. Not for sale!
This relates to some exchanges on the forum from Feb. 2005, but I can't figure out how to link my msg. to that thread.
Edited: 18 Feb 2006, 3:20 p.m.