Lmst

I had to use the #SlideRule early in my #engineering education, many decades ago. Since then, I've collected many slide rules from round the globe. Of those, my absolute favourite is the #Hemmi 130W Advanced Darmstadt—one of the most basic models.

I admit that this is rather a brazen statement in the face of #FaberCastell 2/83 N Novo Duplex, #Aristo 0969 StudioLog, #Nestler 0292 Multimath-Duplex, #K&E 4081-3 Log Log Duplex Decitrig, and many other duplex, advanced, engineering slide rules.