Die labels

More or less a random sample. 1+ were selected because they had dead batteries from the eBay lot which could influence them towards being slightly older

0

AZ original

	SMSC 1C 1C
	1C5737 18A
	-1P39

1

	SMSC 1C 1C
	1C5737 18A
	-1P39

2

	Marking
		SMSC 2C 2C
		2C5737 18A
		-1P89
	Non-optical mask ROM like on gray

3

	SMSC 1C 1C
	1C5737 18A
	-1P39

4

	SMSC 2C 2C
	2C5737 18A
	-1P89

5

	SMSC 1C 1C
	1C5737 18A
	-1P95

SRAM

2 cells (top metal):

2 cells (top metal, crossed polarizers):

Serials

Black internal encasing

Serials:

20831403, 12/31/07 A4 120
21796856, 03/31/08 A5 120
21824463, 03/31/08 A5 120
21824389, 03/31/08 A5 120
21876215, 04/30/08 A7 120
21876327, 04/30/08 A7 120
21942156, 04/30/08 A7 120
21942158, 04/30/08 A7 120
21976165, 04/30/08 A7 120
21976278, 04/30/08 A7 120
21978178, 04/30/08 A7 120
21976311, 04/30/09 A7 120
21976276, 0430/08 A7 120
23871272, 08/31/09 A7 120
23871370, 08/31/08 A7 120
25775991, 05/31/08 A8 120
25776084, 05/31/08 A8 120
25776121, 05/31/08 A8 120
26887178, 04/30/09 B0 120
26887187, 04/30/09 B0 120
26887114, 04/30/09 B0 120
26887209, 04/30/09 B0 120
27314224, 10/31/10 B0 120
- AZ original unit with full size die photographs
28162830, 12/31/04
28195108, 12/31/04
28307459, 09/30/05
38620077, 11/30/04
- Why are these serials so high for being so old? Confirmed this one

Clear internal incasing