LM320MP-12 Negative 12V 1A Voltage Regulator

Spec Sheet
LM320%20MC7912CP%20Mot%20real%20A1%20prototype

Motorola

From a photo of a real prototype Apple-1. The middle of the three is the -12.  On the production Apple-1, the -12 is in a TO-202 case.
Total # on board: 1.

LM320T 12%20NS%20647

National Semi

LM320T-12.  ‘647 date code.  Newer logo, TO-220.  Unused.

LM320MP 12%20NS%208742

National Semi

8742 date code.  Newer logo, TO-202.  Unused.

LM320%20MC7912CP%20Mot%207503

Motorola

MC7912CP.  7503 date code.  Gold plated, unused.