Kahuna23 - there are numerous orders by Mattingly during this time period for M110 bats as pictured. The bat appears to be from 1985, as the "Don Mattingly" engraved signature appears to be a foil stamp which was embossed on some bats in 1985 and 1986. The 23 on the knob appears consistent with other 23's I have seen from this period and the pine tar markings are also consistent. Lastly - PSA ( Taube ) has authenticated Mattingly bats from this period on many occasions and I am confident of the grade they have given this bat. Let me know if I can help any further. Jim Caravello