Dan: It's not clear what the 'T' notation means, but might be for the 'Trap Package.' The 1923 Hunter Arms Co. Price List includes 'SMITH GUNS FOR TRAP SHOOTERS' with the Specialty, Eagle, Crown, and Monogram SBT and DBT guns, followed by: "Above prices include Automatic Ejectors, Special Forend for Trapshooting, and on the Double gun, the Hunter One Trigger." The package included a recoil pad on later guns.