Frank Coster was a cue maker out of Allentown Pennsylvania that began making cues in 1982. He made a ridiculously low amount of pool cues in his time with only a little over a hundred made. They are highly collectible and hard to find. His cues are unmarked. The best way to identify them is the barbell inlays and intricate ring work at the joint.
This is an example of cue repair and cue refinishing work (not for sale) that has been done here at Proficient Billiards. Cue refinishing usually takes about 2 weeks depending on workload.