Faber Castell 398 ten inch electrical engineer’s slide rule. Closed frame, pear wood & celluloid, made in Bavaria in 1931. Scales are LU,A{B,C1,C}D,LL//{S,L,T}//K on edge//dynamo-motor,volt in well. Inch ruler on upper edge. There are tables on the reverse. It has a black card case.

Faber Castell 1/87/387 ten inch System Rietz slide rule. Closed frame, pear wood & celluloid, made in Bavaria in 1939. Scales are: K,A{B,C1,C}D,L//{S,ST,T} There are inch & metric rulers on the edges and tables on the reverse. The metric ruler is continued in the well. It has a black card case.

Faber Castell 1/54 Darmstadt ten inch closed frame wood/celluloid slide rule made in Germany in 1961. Scales are: ins,L\K,A{B,C1,C}D,P\S,T//{LL1,LL2,LL3}. Complete with green and clear plastic case.

Faber Castell 52/82 D-Stab ten inch duplex plastic slide rule, made in 1973 in Switzerland. Scales are: L,K,A{B,C1,C}D,LL1,LL2,LL3//T1,T2,DF{CF,C1F,C1,C}D,S,ST,P. Complete with green/cream plastic case.

Faber Castell 67/87R System Rietz five inch plastic Slide Rule with Addiator on reverse. Made in 1949. Scales are: K,A{B,C1,C}D,L//{S,ST,T} There are inch & metric rulers on the edges. It has a leather case & stylus - logo for Weiger Optik on case. More photos can be seen on the Addiator page.

Faber Castell 67/87Rb Rietz five inch slide rule with Addiator on the reverse. This is the later version of the 67/87R shown above and all the scales are now on the face. The Addiator (shown on the Addiator page) now has a negative window. It has a green, zip up case and a stylus. It dates from 1966. Scales are: L,K,A{B,C1,C}D,S,ST,T.

Faber Castell 111/48 Maschinenzeit ten inch plastic closed frame slide rule, made in 1966. System Dr Winkel. The scales are specialist ones for calculating machining times for drilling, milling, turning, grinding, etc. There are tables on the reverse. Complete with green/transparent display case. With the slide reversed the inner scales become short A{B,C1,C}D scales. There is a cm ruler on the upper edge. A mint condition, German language rule obtained from Germany.

Faber Castell 67/91 Basic Trig slide rule. A closed frame 5” plastic simplex rule, its scales are: in\A{B,C}D//{S,L,T}. It dates from 1966.

Faber Castell 4/87 Rietz slide rule. This 20” scale length slide rule is pearwood with celluloid facings and a metal framed glass cursor. The scales are K,A{B,C1,C}D,L//{S,ST,T}. It has a green cloth covered card case and is dated 4/53.

Faber Castell 67/87 System Rietz five inch plastic Slide Rule. Made in 1965. Scales are: K,A{B,C1,C}D,L//{S,ST,T} There is a metric ruler on one edge. It has a leatherette case.

Boots Ringplan Standard 5” slide rule (NZKG). This is a Rietz rule based on the Faber Castell 167/87 dated Sept 1973. Scales are: K,A{B,C1,C}D,L//{S,ST,T} There is a metric ruler on one edge. It has a vinyl wallet and instructions but was missing its cursor when photographed. This has since been replaced.

Faber Castell 67/54R Darmstadt five inch plastic slide rule with Addiator on reverse. Made in 1955. Scales are: cm,L,K,A{B,C1,C}D,P,S,T//{LL1,LL2,LL3}. The slide is reversible. It has a leather case and stylus. More photos can be seen on the Addiator page.

Faber Castell 67/54b Darmstadt five inch plastic closed frame slide rule made in Germany in 1965. Scales are: cm\L,K,A{B,C1,C}D,P,S,T//{LL1,LL2,LL3}.

Faber Castell 67/87 System Rietz five inch plastic slide rule made in 1958. Scales are: in\K,A{B,C1,C}D,L//{S,ST,T}. It has a leather slip case. Unlike the later version below this variant has no scale designations printed on it. I have another, dated 11/57, promotional for Caltex lubricants.

Faber Castell 57/89 ten inch plastic student’s slide rule, closed frame, made in 1970 in Austria. Scales are: K,A{B,C1,C}D,S,ST,T1,T2//{LL2,S’,LL3}. Complete with gray plastic case and instructions.

Faber Castell 57/92 Student’s Log Log slide rule. Ten inch closed frame plastic dated 7/59 with green card case. Scales are: in\LL2,A{B,C1,C}D,LL3//{S,L,T}. The back is plain

Faber Castell 2/83 Novo Duplex slide rule. A top of the range plastic slide rule with metal end braces dating from April 1966. Its 28 scales, defined on the right hand side, are: K,T1,T2,DF{CF,C1F,C1,C}D,S,ST,P//LL03,LL02,LL01,W2{W2’,L,C,W1’}W1,LL1,LL2,LL3. The W scales (√10X) and (√X) enable more accurate calculations to be performed than is the case with the usual C and D scales. Complete with plastic display case and instructions.

Boots Ringplan Log-Log ten inch duplex plastic slide rule (NS1R), made in Germany by Faber-Castell, dated 5/74. Based on the F-C 52./82 D-Stab above. It has a vinyl wallet instead of a hard plastic case. Scales are: L,K,A{B,C1,C}D,LL1,LL2,LL3//T1,T2,DF{CF,C1F,C1,C}D,S,ST,P. Complete with instructions.

Faber-Castell 57/87 Student Rietz ten inch closed frame plastic slide rule dated 3/65. It has a clear plastic case and instructions. Scales are: in\K,A{B,C1,C}D,L//{S,ST,T}.

Faber Castell 67/22/R Business slide rule with Addiator on the reverse. It has a reversible slide with £,s,d scales on the reverse. The scales on the front are DF{CF,C1,C}D and there are inch and cm rulers. It has a green leatherette slip case. The Addiator is the type with a negative display and the date code (very faint) appears to be 10/58. The stylus is missing. Click here to see the Addiator.

Faber Castell 67/22Rb Disponent slide rule with Addiator on the reverse. It has a green zip case and a combined pen & stylus. Scales are: cm\%,DF{CF,C1,C}D,Sh/d,£. Date code 4/72.

Faber Castell 167/87 Rietz 5” plastic slide rule. It has a green card case. Its scales are: K,A{B,C1,C}D,L//{S,ST,T} There is an inch ruler on one edge. It is dated March 1963.

Faber Castell 1/92 Log Log ten inch wood and celluloid slide rule., made in 1967. Scales are: LL2,A{B,C1,C}D,LL3//{S,L,T}//K on edge. There is an inch ruler on the upper edge. Complete with green/transparent case and instructions.

Faber Castell 2/82 duplex slide rule, plastic with metal end braces. Its 24 scales are: L,T1,T2,A{B,B1,C1,C}D,ST,S,P//LL03,LL02,LL01,K{K’,C,C1F,CF}DF,LL1,LL2,LL3. It has a green card case.

Faber Castell 1/87A Rietz Addiator ten inch wood/celluloid slide rule apparently dated 8/62 with Addiator set into the under-side. Scales are: cm\K,A{B,C1,C}D,L\in//{S,ST,T}. It has a green card case.

Faber 2/82N Castell Duplex plastic 10” slide rule. It has a green/clear plastic display case, instructions (in German), and a card rule with formulae on it, Its 27 scales are: T1,T2,L,A{B,B1,C1,S’,C}D,S,ST,P//LL03,LL02,LL01,K,DF{CF,K’,C1F,C1,C}D,LL1,LL2,LL3

Faber Castell 1/22 Business Slide Rule. A ten inch closed frame, wood & celluloid slide rule with plastic cursor dated February 1969, with a green & clear plastic case. The slide is reversible. The scales are: in\DF{CF,C1,C}D,L\sh/d,£//{LL1,LL2,C}. There are various formulae and conversion tables on the back.

Faber Castell 375 ten inch System Rietz slide rule. Closed frame, pear wood & celluloid, made in Bavaria in 1934. Scales are: K,A{B,C}D,L//{S,ST,T} There are inch & metric rulers on the edges and tables on the reverse. The metric ruler is continued in the well. The cursor is probably a later replacement.

Faber Castell 378 ten inch, closed frame, electrical engineering slide rule, made in Bavaria. Scales are: cm\LL2,A{B,C}D,LL3\in//{S.L.T} with motor & volt scales in the well. Month code 2 year code 9 presumably for February 1929.

Faber Castell 369 five inch, closed frame, mahogany & celluloid, Mannheim slide rule,made in Bavaria. Its scales are: in\A{B,C}D\cm//{S,L,T}. The plastic cursor appears to be a replacement. The tables on the reverse are very rubbed and the date code has been obliterated. Probably early 1930s.

A W Faber 379 five inch electrical engineering slide rule,made in Bavaria. The scales are the same as for the the 378 above. No date code, probably ca.1912. Boxwood and celluloid, plain reverse with model designation, etc on it. Retailed by A Franks Ltd., Manchester.

Faber Castell 1/54 Darmstadt ten inch closed frame wood/celluloid slide rule made in Germany in March 1953. It has the same scales as the one below but is an earlier version without scale designations or the white plastic back and the tables are different. It has a green card case.

A W Faber-Castell GmbH has its origins in the pencil making firm founded by Kasper Faber in 1761. They started making slide rules in 1882 and became Faber-Castell after 1906. Besides slide rules they have made a wide range of pencils and other drawing items such as scale rules.

Faber Castell 360 ten inch, closed frame, slide rule, made in Bavaria. Complete with black card case. Scales are: in\A{B,C}D\cm//{S,L,T}. The year code appears to be 14 but both the rule design and case are those for a 1930s rule and I have therefore concluded that 20 must be added, making it 1934.

A W Faber no. 339 Calculating Rule for School Use. Closed frame, mahogany & celluloid, ten inch rule with reversible cursor for cm to inch conversions. Scales are A{B,C}D//cm,in. Undated, c1930. Black card case.

A W Faber 363 boxwood and celluloid 10” closed frame slide rule with aluminium framed cursor. It has a black cloth covered, oval section, case with ends closed by metal clips. It dates from 1912-24. The scales are: in\A{B,C}D\cm//{S,L,T}.

A W Faber slide rule with digit registering cursor, un-numbered and undated. This 367 predecessor dates from ca.1905/6. It appears to be boxwood and the unfaced edges have inch and cm scales. There is also a cm scale in the well. Scales are A{B,C}D//{S,L,T). Retailed by Dunscombe of Bristol.

Faber Castell 1/87 Rietz ten inch closed frame slide rule made in Germany in 1948. The wood of this rule is beech, used only for a few years after WWII. The facing is celluloid. It has the wrong case - a black cloth covered card case labelled 1/98. It came with a ales leaflet and a manual for Faber slide rules published by Berrick Bros, Scales are in\K,A{B,C1,C}D,L\cm//{S,ST,T}.

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