dr325i
G.O.A.T.
etc = buttcap, pallets, head calfskin, lead/silicone, strung customized weight...and etc.a) pro stock sticker (older ones have code printed in throat area)
b) weight of the hair pin
c) paint job which belongs to a different model/ racquet mould
d) etc.
All of these ("etc") are good indicators but not necessarily make the racket a pro stock