This listing is for a 1957-1958 Saginaw "Safety Power Steering" pump w/reservoir (5685021). Correct for all 57-58 Buick Olds Cadillac (also some late 56 models). It was removed from my lifelong AZ 57 Cadillac parts car and stored indoors. The lid is cast aluminum, and in excellent condition (no cracks). The unit should be cleaned, resealed, and repainted before use. The unit spins freely as it should. Please look at all the images and email me with any questions. As always, thanks for looking.