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Geotec Slide Rules
Models 341 3010 to 341 3690
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Hughes-Owens 1760 to 1778 |
Hughes-Owens 341 3010 to 341 3738 |
Geotec 341 3010 to 341 3690 |
COMING SOON CLICK to go to the CATALOG Archive |
 HEMMI CLICK to go to the Hemmi/Sun Archive |
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An interesting transitional set, showing the new Geotec case and logo, late model number (341-3215),
but the rule is still marked with the Hughes Owens logo.
Click to see a bigger view.
| Model Number | Date | Description Scales |
Equivalents | Comments |
| 341 3010 |
1968+ | 10" Versalog Ib, 23 scales LL0 LL/0 K DF [ CF CIF CI C ] D R1 R2 L LL/1 LL/2 LL/3 [ TT SecT ST CosS C ] D LL3 LL2 LL1 |
H-O 1777 H-O 341 3010 Post 1460 |
Versalog Ib, COS scale in green |
341 3012  |
1968+ | 10" Versalog II, 24 scales LL/0 K A DF [ CF CIF CI C ] D R1 R2 L0 L LL/1 LL/2 LL/3 [ TT SecT SRT CosS C ] D LL3 LL2 LL1 |
Post 1460 T-P 44CA-600 |
Versalog II, with A scale |
| 341 3050 |
1968+ | 5" Versalog Ib, 23 scales LL0 LL/0 K DF [ CF CIF CI C ] D R1 R2 L LL/1 LL/2 LL/3 [ TT SecT ST CosS C ] D LL3 LL2 LL1 |
H-O 1778 H-O 341 3050 Post 1461 |
Pocket version of 341 3010 |
| 341 3052 |
1968+ | 5" Versalog II, 24 scales LL/0 K A DF [ CF CIF CI C ] D R1 R2 L0 L LL/1 LL/2 LL/3 [ TT SecT SRT CosS C ] D LL3 LL2 LL1 |
Post 1461 T-P 44DA-610 |
Pocket version of 341 3012 |
341 3215
|
1968+ | 10" Mannheim, 9 scales A [ B CI C ] D K [ S L T ] |
Hemmi 50W H-O 1771 H-O 341 3215 Post 1452W T-P 44BA-520 |
Universal Mannheim. |
| 341 3425 |
1968+ | 5" Mannheim, 9 scales in // A [ B CI C ] D K [ S L T ] |
Hemmi 34RK H-O 1762 H-O 341 3425 Post 1444RK T-P 44DA-440 |
Pocket version of 341 3215 |
341 3526   |
1968+ | 10" student Mannheim, 9 scales A [ B CI C ] D K [ S L T ] |
Hemmi 40RK H-O 1768C H-O 341 3526 Post 1447 US Blue 1877 |
Student version of 341 3215 |
| 341 3530 |
1968+ | 10" plastic student Mannheim | Hemmi P50D Post 1447P |
Hemmi |
| 341 3630 |
1968+ | 10" plastic student Mannheim, 9 scales S K A [ B CI C ] D L T |
unknown | Not Hemmi |
| 341 3645 |
1968+ | 10" Darmstadt, 13 scales T K A [ B CI C ] D L S ST [ LL1 LL2 LL3 ] |
Hemmi P280 T-P 1414 T-P 44BB-140 |
Only known Hughes-Owens or Geotec Darmstadt |
| 341 3690 |
1968+ | 10" plastic Versalog II, 24 scales LL/0 K A DF [ CF CIF CI C ] D R1 R2 LL0 L LL/1 LL/2 LL/3 [ TT SecT SRT CosS C ] D LL3 LL2 LL1 |
unknown | Unusual plastic Versalog II, made by Hemmi |
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| Archive Navigation, CLICK on the LOGO to Visit | ||||||
Hughes-Owens 1760 to 1778 |
Hughes-Owens 341 3010 to 341 3738 |
Geotec 341 3010 to 341 3690 |
COMING SOON CLICK to go to the CATALOG Archive |
HEMMI CLICK to go to the Hemmi/Sun Archive |
CLICK to go to the POST Archive |
CLICK to go to the Teledyne Archive |
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 . Hughes-Owens and Geotec slide rule data and original HTML copyright 2001 by John Spivey, used with permission. Site Design & HTML contents copyright 1997, 1998, 1999, 2000, 2001, 2004 by Walter Shawlee 2 & the ad hoc Godzilla Graphics Group. |
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