|Re: What is your Holy Grail, and do you own it?|
Message #18 Posted by Michael Plant on 10 Sept 2010, 12:27 a.m.,
in response to message #17 by Palmer O. Hanson, Jr.
My two 1940's vintage 4081-3s both have the following scales:
Front: LL0, LL00, A, [ B, T, ST, S, ] D, DI, K
Back: L, LL1, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
The serial numbers are 382813 and 414326 and they date to 1945/6. Both these slide rules have solid celluoid covered edges.
The other one is serial number 393487 (apparently K&E reset the serial numbers every so often) and it has mahogany edges with inlaid celluloid - what Walter Shawlee at Sphere Research calls "relieved wood" edges (there's a picture of this here http://www.sliderule.ca/ken408e.jpg). The Dietzgen 1734 and N1725 have the same edging. The scales on this slide rule are:
Front: LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Back: LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
BTW, when dating a K&E slide rule, you have to look at the serial number, the scale sets, and the patent dates:
http://www.sliderulemuseum.com/?PHPSESSID=f37c9f3c94a451c50eb872a57e936cf6 (see K&E entry)
Regarding the TI-55II, yes, I don't have a single example of ANY of the TI's from that era (TI-57 LCD, TI-54, TI-55II) with a 100% functioning keyboard. The TI-55III that I have still works flawlessly, but it is lighter, smaller, and doesn't have the solid "quality" feeling that the TI-55II has... Funny, the Casio fx-570 that I had in middle school, and which I used grudgingly while salivating over a friend's TI-55II, looks and functions like it's new. Comparing them now, it seems to be more feature rich, too! I was quite disappointed when I finally got a TI-55II a couple of years ago and couldn't actually use it!