A W Faber / Faber-Castell Slide Rules

Image My second slide rule was an A W Faber-Castell 1/92 Log Log (195?). I was immediately impressed with its quality of craftsmanship and 'feel'. In need of a direction in this new interest, I found out a little more about Faber-Castell's slide rules and their history, and decided to focus on them as a manufacturer. Other fairly significant reasons for concentrating on Fabers were the relative wealth of information on them, particularly in regard to dating them, and their prevalence and hence affordability.

Faber-Castell (as AW Faber) made slide rules from around the start of the slide rule mass production era, and their rules are generally regarded as amoungst the highest quality. As I am interested in 'old things' and their developement, I narrowed my focus on Fabers to from their earliest models in the 1890's, through their model range explosion, up to when they first changed their model numbering system around 1935 - their formative years. After this came the Second World War and a rationalisation their range.

I have most of the more common models from my period of interest, but actually less than half of the variants made. My earliest rules are unlabelled models 350 and 360 from around 1895-99, followed by several examples of models from the period up to the start of the First World War when there was a lot of experimentaton and advances in construction. I have only a few rules from after the model numbering changed, my largest and most advanced is a 344/83 Novo-Duplex demonstration rule for a 2/83 from 1964, and my youngest is a 1970-75 310/88,89 OHP demonstration rule.

The Model Summary below contains a list of my Faber/Faber-Castell slide rules with summary details. This is followed the rules grouped as Model by Type - Mannheim, Enhanced Mannheim, System Rietz, System Darmstadt, Log Log, Business, Electro, Other Systems and Demonstration - and by scale length within that.
Models Summary
List of my Faber/Faber Castell models with defining characteristics. Multiple date entries within a model number indicates multiple versions/examples.
Click on model number to go to model page with detailed descriptions, comparisons and photo gallery of all examples
of a model, or click description to jump down to model within context by type and scale length on this page.
Brand Model No Description2 Material1 Scale4 
cm 
(Top Face Length x Width mm) Year  (years
produced)3
A W Faber "Castell" 1/54 Darmstadt   W/C 25  (300 x 32) 1943  (1934-76)
A W Faber "Castell" 1/60/360 Enhanced Mannheim   W/C 25  (300 x 32) 1935  (1935-9)
A W Faber-Castell 1/92 Log Log   W/C 25  (300 x 32) 195?  (1939-64)
A W Faber 309 Enhanced Mannheim, school use   W/C 25  (300 x 30) 1934  (1929-35)
Faber-Castell 310/88,89 Reitz-N & Log Log, OHP demonstration   P 20  (246 x 59) (1970-5)
A W Faber "Castell" 322 Disponent, commercial   W/C 25  (300 x 30) 1935  (1933-5)
A W Faber 332 Mannheim, pocket, school use   W/C 12.5  (142 x 24) 1930  (1929-35)
Faber-Castell 334/83 Novo-Duplex, demonstration   W/P 100  (1392 x 450) 1964  (1962-75)
A W Faber 339 Mannheim, school use   W/C 25  (280 x 27.5 &
 295 x 27.5)
1928 
& 1935 
(1920-35)
A W Faber "Castell" 342 "Columbus" System Rohrberg, commercial desktop   W/C 50  (385 x 44) 1934  (1923-35)
A W Faber "Castell" 344 Enhanced Mannheim, additional scales   W/C 25  (280 x 27.5) 1922  (1915-29)
A W Faber "Castell" 345 System Hohenner, barometric   W/C 25  (280 x 27.5) 1927  (1912-35)
A W Faber 350 Enhanced Mannheim   W 25  (260 x 27.5) c1896-9 
(x2) 
(1892-1910)
A W Faber &
A W Faber "Castell"
360 Enhanced Mannheim   W/C 25  (260 x 27.5 &
 280 x 27.5 &
 300 x 27.5)
c1896-9,
c1900,
c1906-7 
& c1913,
1914-20,
1922,
1927, 1929 
& 1935 
(1895-1935)
A W Faber &
A W Faber "Castell"
361 Mannheim, student   W/C 25  (280 x 25 &
 280 x 27.5)
c1908-13,
1921 
& 1922 
(1906-33)
A W Faber &
A W Faber "Castell"
363 Enhanced Mannheim, decimals   W/C 25  (280 x 27.5 &
 295 x 27.5)
c1904,
c1908-9 
& 1933 
(c1900-35)
A W Faber 364 Enhanced Mannheim, slide springs, mnemonics   W/C 25  (280 x 27.5) c1906 
& c1908-9 
(1903-12)
A W Faber 364A Enhanced Mannheim, slide springs, mnemonics, normal scales   W/C 25  (280 x 27.5) c1906  (1903-12)
A W Faber 365 Enhanced Mannheim, slide springs   W/C 25  (260 x 27.5) c1898-9 
& c1901-3 
(c1900-12)
A W Faber 365A Enhanced Mannheim, slide springs, normal scales   W/C 25  (260 x 27.5 &
 280 x 27.5)
c1906 
& c1910-2 
(c1900-12)
A W Faber &
A W Faber "Castell"
367 Enhanced Mannheim, digit registering cursor   W/C 25  (280 x 27.5) c1900,
c1903-4,
c1908-9,
c1910-3 
& 1929 
(c1900-35)
A W Faber 367A Enhanced Mannheim, digit registering cursor, normal scales   W/C 25  (280 x 27.5) c1906  (1903-12)
A W Faber 368 Electro   W/C 25  (280 x 27.5 &
(285 x 26.5)
c1906 
& c1907,
c1907-8,
c1908, c1908,
c1910-1 
(1903-12)
A W Faber "Castell" 369 Enhanced Mannheim, pocket   W/C 12.5  (150 x 23) 1925 
& 1927 
(1906-35)
A W Faber "Castell" 373 Mannheim, mini   C 10  (122 x 18) 1931  (1929-35)
A W Faber "Castell" 375 Rietz   W/C 25  (280 x 32 &
 295 x 32)
1921, 1926 
& 1933, 1934 
(1920-35)
A W Faber "Castell" 376 Enhanced Mannheim, additional scales   W/C 25  (280 x 30 &
 300 x 30)
1931 
& 1935 
(1924-35)
A W Faber &
A W Faber "Castell"
378 Electro   W/C 25  (295 x 32) c1911-3 
& 1932 
(1908-35)
A W Faber "Castell" 379 Electro, pocket   W/C 12.5  (156 x 27.5) 1922  (1913-36)
A W Faber "Castell" 380 Enhanced Mannheim, desktop   W/C 50  (535 x 32) c1914-20  (1903-32)
A W Faber "Castell" 386 Rietz, pocket   W/C 12.5  (165 x 28.5) 1935  (1924-35)
A W Faber "Castell" 387 Enhanced Rietz   W/C 25  (305 x 35) 1931  (1925-35)
A W Faber "Castell" 388 Electro, desktop   W/C 50  (572 x 32) 1929  (1924-30)
A W Faber "Castell" 389 Enhanced Mannheim, mini   W/C 10  (122 x 18) 1922 
& 1930 
(?1929-35)
A W Faber "Castell" 390 Enhanced Mannheim, additional scales, pocket   W/C 12.5  (152 x 26) 1934  (1929-35)
A W Faber "Castell" 392 Mathematiker   W/C 25  (305 x 35) 1930  (1929-35)
A W Faber "Castell" 394/N Rietz, long body   W/C 25  (300 x 32) 1935  (1934-5)
A W Faber "Castell" 398 Electro, enhanced   W/C 25  (305 x 35) 1929  (1929-35)
A W Faber "Castell" 4/60/380 Enhanced Mannheim, desktop   W/C 50  (575 x 35) 1936  (1935-9)
A W Faber 51/91/309 Enhanced Mannheim, school use   W/C 25  (300 x 30) 1938  (1935-9)
A W Faber (unbranded) 52/39 Mannheim, school use   W/L 25  (300 x 30) 1938  (1935-40)
A W Faber "Castell" 61/98/319 Electro, enhanced, pocket   W/C 12.5  (155 x 26.5) 1935  (1935-9)
A W Faber "Castell"
(Klawun)
73/91 Enhanced Mannheim, mini   W/C 10  (122 x 18) 1940  (1935-42)
Faber-Castell 8/10 Circular   P 26.4  ( 120) 1969  (1965-75)

1 A = Aluminium; C = celluloid; D = cardboard; I = ivory; L = painted; P = plastic; W = wood; X = Perspex
2 Most Faber/Faber Castell slide rules feature 'railway-track' rather than 'normal' (non-railway-track) scales.
3 From Peter Holland's excellent book "Slide Rules A.W. Faber A.W.Faber-Castell" (apart from dates before 1903), a highly recommended resource available here.
4 For circular models this is the circumference where 'stock' and 'slide' meet.
Models by Type
Mannheim (A [ B, C ] D Scales)
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
10cm Scale Length (Mini rule)
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or click image to go to version on that page.
12.5cm Scale Length (Pocket rule)
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or click image to go to version on that page.
Enhanced Mannheim (Additional Trig. Scales)
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or click image to go to version on that page.
10cm Scale Length (Mini rule)
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
50cm Scale Length (Desktop rule)
System Rietz (K & L scales on front)
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or click image to go to version on that page.
12.5cm Scale Length (Pocket rule)
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or click image to go to version on that page.
System Darmstadt (K, CI, P & LL Scales)
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or click image to go to version on that page.
25cm Scale Length
Log Log (LL Scales)
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or click image to go to version on that page.
Business (Commercial use)
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or click image to go to version on that page.
25cm Scale Length
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or click image to go to version on that page.
Electro (For electrical & mechanical engineers)
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or click image to go to version on that page.
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
50cm Scale Length (Desktop rule)
System Hohenner (Barometric)
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or click image to go to version on that page.
25cm Scale Length
Circular (Continuous Scale)
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or click image to go to version on that page.
26.4cm ( 8.4cm) Scale Length (D & C scales)
Demonstration (For teaching purposes)
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or click image to go to version on that page.
Click model header to go to model page with detailed descriptions, comparisons and photo gallery,
or click image to go to version on that page.
100cm Scale Length (Wall hung rule)
Count Belmiro © Copyright December 2011 - August 2017
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