Diwa 601-1 Rietz slide rule dating


Wow! I bought today the slide rule in the subject! What a marvel! It's a 12.5 standard, but what a slide rule!

With no jokes, please, about dating a slide rule (something similar recently took place when I started a thread about "dating a calculator"; I know Americans use "date a girl" to mean "establish the date to go out with a girl"; in Italian this has no sense, since we use "darsi un appuntamento" and "datare" means "finding the date"), is there a way to find when a slide rule has been produced? From the box, the leather case, the slide, the stator, the cursor I can get no information apart the following on back side of the slide:

No. 601-1


-- Antonio


Googling around gives a very nice italian site ;-)

As for **when** they were built, I can't help sorry.

Greetings from France



Sorry, I forgot the very best site.



Of several good reference books on slide rules the one I prefer is by Peter Hopp of Great Britain. Unfortunately, my copy is stored at my winter home.

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-41 Plastic Slide mbrethen 4 1,023 11-01-2013, 10:14 AM
Last Post: Kimberly Thompson
  OT: Jeppesen E6B Wind-Easy Computer (Slide Rule) Eddie W. Shore 18 3,219 10-12-2013, 03:26 PM
Last Post: George Litauszky
  Cleaning old slide rules aurelio 3 1,005 09-18-2013, 03:25 PM
Last Post: aurelio
  slide rule magnifiers Al 15 2,386 09-17-2013, 04:49 PM
Last Post: aurelio
  trig scales on the Post Versalog slide rule Al 12 1,870 09-15-2013, 06:01 AM
Last Post: John I.
  First experience with a slide rule aurelio 27 3,590 08-17-2013, 01:16 PM
Last Post: Garth Wilson
  A slide rule to conquer the moon revisited Palmer O. Hanson, Jr. 12 1,954 06-19-2013, 03:05 PM
Last Post: Ken Shaw
  A slide rule to conquer the Moon Gilles Carpentier 11 1,591 06-03-2013, 02:36 PM
Last Post: Ingo
  OT: My Slide Rule Collection Eddie W. Shore 18 2,936 04-25-2013, 11:47 PM
Last Post: Garth Wilson
  More Slide Rule Stuff... . .... Thomas Chrapkiewicz 1 603 09-25-2012, 03:41 PM
Last Post: Kiyoshi Akima

Forum Jump: