Description Overview Eight roving frames available for sale. All units are 120-position machines. Machine Inventory Mill 1A: Zinser 660, year 1987. Mill 1B: Rieter F4/1, year 1993. Mill 2B: Rieter F4/1, year 1993. Mill 3B: Zinser 660, year 1988. Mill 4B: Rieter F1/1A, year 1989. Mill 5B: Zinser 660, year 1988. Mill 6B: Zinser 660, year 1991. Mill 1E: Zinser 660, year 1989.