> Depends.  How do you define "old"? :)

Tough question. Finally I found:

525-1183-01
525-1183-02          2.7 Version 8
525-1183-03          2.9 Version 16
525-1183-04          2.10 Version 6
525-1183-05          2.12 Version 2 (adds support for 2 SM40 Modules)
525-1342-01          2.14 Version 5
525-1389-01          2.14 Version 5
525-1342-03          2.14 Version 7
525-1383-01          2.19 Version 3 (adds support for hyperSPARC)
525-1383-02          2.22 Version 1 (adds support for SuperSPARC II)
525-1383-03          2.25 Version 0 (adds 150MHz hyperSPARC support)

Harald.