In my search for the ever-elusive NOS C64 power supply, I found the following information on the comp.sys.cbm google group. Thought it might be of help to others looking to purchase used PSU’s on eBay and such. In particular, there is information regarding which PSU versions are repairable. A big plus when making a decision to purchase a used C64 PSU.
Part Number Watts/Amp/VA Ribs Colour Conn. Pins Comment
251052-01 8.4W Partial black 7
251052-02 8.4W Partial black 4 #1
251052-02 7.5W Full black 4
251053-02 8.5W Full beige 4
251053-02 7.5W Full beige 7
251053-10 1.7A Full beige 7
251053-10 8.5W Full beige 4
310157-01 8.5W Full black 4 #2
310157-02 7.5W Full black 7
902503-01 6.5VA None black 7 #3
902503-02 7.5VA None black 7 #3
902503-06 1.5A None dk. beige 4 #4
Notes
#1 Has UL/CSA registration on body not on label
#2 There is a PN -02 identical to -01
#3 Sloping sides, repairable
#4 Sloping front, 110/220V 50 Hz input
Ratings - are as shown on nameplate/body. Essentially
1.5Ax5VDC = 7.5VA = 7.5Watts.