During the 1830s and 1840s, the Bechtler Mint in what was then Polk County but is now Rutherford County produced more than $2.24 million in gold coins for circulation and refined an additional $700,000 in raw gold, making it the most successful private mint in U.S. history. The story of the Bechtler Mint is told in a UNC-TV documentary filmed primarily in Polk and Rutherford counties. A premiere for the film will be held at R-S Central High School in Rutherfordton, N.C. on Saturday, Sept. 29, and the documentary will air on UNC-TV Tuesday, Oct. 2 at 9 p.m. and Thursday, Oct. 4 at 10 p.m.