This is a brand new unused genuine Commodore Power Supply for an Amiga computer A500 / A600
Information from moulding on top reads:-
Model STP 140 Part No 340031-03
1541-II / 1571-II / 1581
Input 240V ~ 50Hz 0.15A
Pin 1 +5VDC 1A
Pin 2 Ground
Pin 3 NC
Pin 4 +12VDC 0.5A