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. The Parts manual also has references to other TOS lathes that used the same parts including the SN70, SN71, SN55, SN30, SN55, etc.