GC I's and II's had the old style/best ball counters (these pics show the newer style overseas counters) GC I's and II"s did not have colored corner pocket irons, my guess they are III's or a mixture. or later? If it's a matched slate set (all slate sets.... have a chalk type ''('' mark on the back underside to confirm they are a MATCHED SLATE SET.... ck em before U buy, and of course make sure there are no cracks in your slates and the dowel pins in the slates are intact, if that's all there then it's a good table. If the tables have been recovered allot, the slate frames will show the wear from years of cloth replacement, but no biggie here, unless the wood is shot, then you'd replace or repair your slate frames at the same time, poplar wood I think, no biggie.