You can never be sure without an authentication, usually from Pete Tascarella, who's recognized as the go to man...that said, if I saw a four point, four veneer cue with a straight grain maple forearm (not BEM or fiddleback/tiger), points a little shorter than you'd normally see in modern cues, white/green spec Cortland wrap, a brown bumper, SS 5/16x14 joint and maybe a Bushka ring at the A-joint (just ahead of the wrap), I'd get a little excited. Brightly colored enamel rings in the butt sleave are pretty unique to fancier Bushkas, but tribute cues use these, too. Verl Horn made many that passed for Bushkas in seconary market, and were jam up cues in their own right. But there are thousands of contemporary and later made cues that fit this description. They are typically a little fatter in the butt and 57" long.
Oh, and if it's signed on the forearm, then try not to hurt the old fella's feelings when you laugh...