I haven't been online the past few days- too bad I missed this thread when it was fresh. My first inclination was Max Mehl.
SALES IN 1930 1873 Proof. $2.50. 1873-S Unc. $2.50. 1874 Proof. $2.50. 1875 Proof. $2.50. 1875-CC Unc. $5.00. 1876 Proof. $2.50. 1876-CC, VF, $4.00. 1877 Proof. $2.50. 1877-S Unc. $1.50. 1878 Proof. $2.50. 1878-S Unc. $1.50. 1879 Proof. $2.50. 1880 Proof. $2.50. 1881 Proof. $2.50. 1882 Proof. $2.50. 1883 Proof. $2.50.
B. Max Mehl’s sale of the F.H. Knoop Collection, December 8, 1931, contained a date run of trade dollars. Among Proofs, the 1883 took top price at $2.50, followed by 1873 and 1878 tied at $2.25 each. 1873 Proof. Very scarce in Proof, as are all. $2.25. 1874 Proof. Slight spot on reverse. $1.90. 1875 Br. Proof. $1.75. 1876 Proof, with complete wire edge on obverse. $1.75. 1877 Fine. $1.75. 1878 Purple Proof. Scarce. $2.25. 1878-CC Good. $2.50. 1879 Proof. $1.75. 1880 Proof. $2.25. 1881 Proof. $1.60. 1882 Proof. $1.60. 1883 Proof. $2.50.