HP-16C Date: 01/25/2004 HP-16C, single-board, first generation electronics:
1LF5-0301 CPU
1LE2-0322 ROM/RAM/display
HP-15C Date: 01/25/2004 HP-15C, single board, second generation electronics:
1LM2-0301 CPU
1LH1-0306 ROM/RAM/display driver
1LH1-0302 ROM/RAM
Single-chip HP-12C Date: 01/25/2004 HP-12C, single-board, third-generation electronics:
1LQ9-0322
Two-chip 12C Date: 02/03/2004
Top of HP-12C PCB showing snap-discs for keyboard Date: 02/03/2004 Top side of an HP-12C PCB, showing the snap-discs for the keyboard. This unit has a broken LCD display.
HP-12C front case with rubber membrane Date: 02/03/2004
HP-12C front case with rubber membrane removed, showing double-shot injection molded keys. Date: 02/03/2004 HP-12C front case with rubber membrane removed, showing double-shot injection molded keys. Most keys are first molded with the dark plastic, then with light plastic for the legend.
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