3 ms·
Hemmi or Faber-Castell for linear slide rules, Concise for circular ones. The latter are still available on Amazon US or JP, I'd suggest the 300 or 270N.
by fmajid 4y ago
Hemmi or Faber-Castell for linear slide rules, Concise for circular ones. The latter are still available on Amazon US or JP, I'd suggest the 300 or 270N.