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We are independent dealers in Cambridge, England, specialising in: Antique pocket watches, Timepieces and Scientific Instruments.

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SLIDE RULES & CALCULATING EQUIPMENT

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Please ask for further information on any item listed. If the item is not pictured, a gif image can be provided for you.

Length is approximate TOTAL length of rule, not just the scale.

Fowler 'Type B' textile calculator. Rotating cursor and scales for Cotton, Linen & Worsted. In original (rather tired!) case. 8.5cm diameter. £SOLD

Superb cased A.W.Faber 12inch Addiator Universal with original stylus. Reset slide at one end, stylus housed in the other! The ultimate calculator!! Very slight crack (2cm) on the ruler side of one end, but no chips or unsightly marks. £180 ($259)

Blundell Omega Reitz 12inch #401 in original case. Chip to top left corner and a few scratches. K,A,B,C1,C,D,L,S,ST and T scales. £20 ($28)

BRL G.27 11inch in original case. No chips, dings or scratches. DF,CF,C,D and A scales. £25 ($36)

Faber-Castell 12inch 1/87 Reitz  rule in original green plastic case. Near mint condition. K,A,B,C1,C,D,L,S,ST and T scales. £35 ($50)

A.W.Faber Castell 12 inch #360 in original case with instructions. Nice condition with no chips, dings or scratches. Owners name underneath slide. £25 ($36)

A.W. Faber 12inch #398 electrical rule in original case. Near mint  condition with no chips, dings or scratches. £25 ($36)

Faber-Castell 6inch #67/98b electrical rule in original case. LL2,A,B,C1,C,D,LL3,S,L and T scales. Nice condition with no chips, dings or scratches. £25 ($36)

Castell-Elektro #1/98   12 inch rule in original case. Last inch missing from the ruler edged right hand side, back instructions missing and a scratch on the face. £SOLD

German issue A.W. Faber-Castell #1/87 Reitz 12inch rule with original case. Near mint condition. £25 ($36).

P.I.C. 12inch QUOT+1 PROD-1 rule in original case. Hefty glass cursor with small chip missing in top right hand corner. £20 ($28).

PIC Military Pattern 1448 12inch SPEED-TIME-DISTANCE rule in original case. Scales for Seconds, Minutes, Sea Miles, Knots, Hours and Days. Nice condition, but some discolouration to the paper instructions on the reverse. £125 ($180)

'Magic Brain Calculator' in original case with instructions and stylus. Plastic and white metal alloy construction marked 'Made in Japan'. Box has performed well in protecting the machine!  Box: 85mm x 145mm. £70 ($100)

Mint in Box! Aristo Scholar #0901   13inch rule. L,K,A,B,B1,C1,C,D,S,ST,T,LL1,LL2 AND LL3 scales. £40 ($57)

Thornton AD 050 Log Log 14inch rule in original case. Slight UV discolouration. LL2,LL3,L,A,B,C1,C,D,S,ST and T scales. £18 ($25)

Monster A.W. Faber-Castell #4/60/380  22inch rule in half original box,- lid is missing. Good condition, but cursor is cracked. £90 ($129)

Decimal currency converter nomograph by 'Empire' (Smiths), patented 1967. Diameter 15cm. £48 ($69)

Jeppesen CR-1 Flight navigation computer in original case with manual, circa 1973. Celluloid construction. £68 ($97)  Diameter 10.5cm

British military load rule for the Bristol & Belgian helicopter. Super piece with original case....but missing cursor! Length 31cm.£68 ($97)

'K Accurator' mechanical pocket calculator for addition and subtraction with case, stylus and instructions. Made in Hong Kong. 4cm x 16cm. £48 ($69)

'Atlas Copco' compressed air slide rule with case and instructions. Celluloid construction, 17cm long. £30 ($43)