TOS SN-40, SN-40B, SN-45B and SN-50B Operation & Parts Manual
TOS SN-40, SN-45, SN-50, SN-40B, SN-45B and SN-50B Lathes: Operator's Instruction and Maintenance Manual and a separate Parts Manual. The two manuals were originally published individually - but both are required - the Operation and Maintenance Manual refers continually to Part Numbers that are only in the Parts Manual.