Instruction book for insulation test sets
AN/PSM-1A & AN/PSM-2A
Navships 91608A
dated: 10 April 1952

Tech manual for insulation breakdown test set
AN/PSM-25
Navship 0967-211-5010
Dated: 17 October 1966

Instruction book for insulation test sets
AN/PSM-1A & AN/PSM-2A
Navships 91608C
Dated10 April 1952
Change 1 dated: 3 Aug 1960
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Best price gets 'em

email me at cowboy67@casscomm(DOT)com

Jim