_______________
 ,----|.------.------.|------------------.
 | 1'9||'7""6"|5"""4"||3""""""2'''''''''1|
 |----||------|------||------------------|-------,
  \_  || | 1''|''''''||""""3""""4"""5""6""7'8'9'1|
  /___||_|____|______||__________________________|
 | 1''||'''''2|"""""3||"4"""5""6""7'8'9'1|------`
 |____|`------^------`|__________________|
  \___\===============/_________________/
       `-------------`

=======My Slide Rules============================

  :: Concise No. 300 "Circular Slide Rule"
  :: Faber Castell 57/87 Reitz
  :: Thornton AA 010 Comprehensive
  :: Aristo Nr. 0980 TriLog
  :: Aristo 0970 MultiLog

ASCII art courtesy of Andrew Nikitin.
=================================================