[[black_teardown|Mechanical teardown]]

[[https://siliconpr0n.org/map/rsa/securid/black/black_securid__ns50u_semipol/|Top metal]]

====== 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):
{{gallery>:rsa:securid:black:azjm:sram:sram_cell.jpg}}

2 cells (top metal, crossed polarizers):
{{gallery>:rsa:securid:black:azjm:sram:sram_cell_xpol.jpg}}


====== 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 =====

Serials:
  * 32336038, 12/31/09 80 120
  * 43263383, 11/30/10 84 123