This is a signature model Cliff Johnson bat that was used by Astros team member Norm Miller as evidenced by the uniform number 21 on the knob and Johnson wore number 6 during the era that this bat was made/used per H&B shipping records. The factory stamps are perfect and the bat shows great use but there is a deep dent on the word "Genuine" Bat grades an A5.5 with -2 for the other player number on knob and -.5 for the dent. LOA Troy R. Kinunen / MEARS Auctions