The A60 was listed as the ideal practice arrow for beginners. Te X300 was matched cedar shafts. The X200 were precision matched. These changed as Bear offered Bear-Easton,A10 Micro-flite,A20 A40 Bear top grade cedar, the higher the # the lower the grade. In 1962 Bear's top cedar was the A50 Thunderbird. You About have to reference the cataloges. Hope this helps.