No statement of edition, the usual practice for Simon & Schuster distributed books of that period.
First printing according to the number line: "1 3 5 7 9 10 8 6 4 2".
The code "05891745" on the back of the dustjacket indicates the month/year/price (-.50) (the usual practice for Simon & Schuster distributed books for that period.) The date is confirmed by Locus1.