This is a set of 1994 golf balls produced by Warner Brothers and featuring Tweety Bird over a light blue background with a golf club over his shoulder.  All 4 balls are the same image. The opposite side of the ball reads "#1 ACME golf club. 1994. Warner Bros".  One side of the ball reads "Club de Golf".  None of the balls look used.
Dad had the 4 balls in a Looney Tunes box "by Armitron", which, I think was supposed to hold a watch.  No watch, of course, but you'll get the box with the balls inside.

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