Antiques (US) 
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$99.99
US Marine Inst Co Parallel Rule
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$498.67
Military. 1930 US NAVY TECHNICOLOR MOTION PICTURE CORP SURVEY TRANSIT
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$345.00
Antique Kelvin Hughes 24" Brass Parallel Ruler Nautical Navigation Tool in Box
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$38.38
Parallel Ruler Navigation Instrument Ruler With Wooden Box 21'' Accurate Tool
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$89.99
T.S. and J.D. Negus Antique Brass Maritime Navigational Parallel Rule Red Felt
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$32.76
Vintage Weeks & Path Marine Navigation Parallel Ruler #142 15 Inches
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$39.99
Vintage Kelvin & Hughes Hinged Brass Parallel Ruler Nautical 24'' Great Britain
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$49.99
Vintage Hinged Parallel Ruler Nautical Brass Made Great Britain Kevin & Hughes
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$22.00
Mayline Naval Navigation Parallel Ruler Drafting Tool Sheboygen, WI 18"
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$39.95
Vintage Ebony & Brass 18" Parallel Rule Navigational
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$15.00
Lucite C-thru Parallel Ruler for Map Navigation aid vintage USA make
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$25.00
Vintage Kevin & Wilfrid O White Parallel Ruler, 21 inches
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$17.00
Vintage C-Thru Ruler Co, Conn, Black Bakelite Parallel Rule Ruler 18" Navigation
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$57.41
Parallel Ruler Brass Divider Pencil Compass Wooden Box Navigation Instrument
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$425.00
Rare vintage E.R.WATTS & SON Parallel Rules London year 1943 (WWII).
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$42.74
SURVEYING UNIVERSAL MINI DRAFTER BOARD MASTER DRAFTING ARM ENGG INSTRUMENTS
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$99.99
Vintage Hinged Parallel Ruler Nautical Brass Made In Great Britain
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$39.95
Parallel Navigation Ruler Brass Accessory In Box West Marine Denmark
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$10.85
1981 Harry Golub Nautical Plastic Ruler, Nautac
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$8.09
Vintage C-Thru P-72 Paraglide Protractor Plotter Nautical Statute Ruler 1450
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$69.95
Antique Brass Parallel Rule Nautical Navigation Instrument T. S. & J. D. Negus
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$50.00
MARINE NAVIGATION PARALLEL RULER Keuffel & Essex Co. 1915
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$175.00
NEGUS Antique Parallel Ruler In Box
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$22.01
Parallel Ruler Bar 12" Inches 6 mm Thickness High Quality Line Accurate Tool
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$170.00
Antique Large Brass Nautical Instrument by Bliss New York C 19th
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$23.00
Antique Bakelite Ship's Parallel Rules - Small 8.75" - Mantiques
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$49.99
PARALLEL RULERS
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$34.19
Parallel Ruler Navigation Instrument Ruler With cover 21'' Accurate Tool
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$28.61
Parallel Ruler Bar 12" Inches 6 mm Thickness High Quality Line Accurate Tool
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$24.69
High-Quality 12-Inch Parallel Ruler Bar 6mm Thickness for Accurate Straight Line
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$96.92
Antique Navigation Parallel Rule Stanley London British Made small 6.25 inches
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$40.84
SURVEYING UNIVERSAL MINI DRAFTER BOARD MASTER DRAFTING ARM ENGG INSTRUMENTS
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$299.99
Antique Kelvin & Hughes 24" Brass Parallel Ruler Nautical Navigation Tool in Box
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$29.95
Vintage C-Thru Ruler Co, Conn, USA Black Bakelite Parallel Rule Ruler 12" #CL69
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$144.54
Brass Rolling Ruler, Hall Harding Ltd London, with Box, Navigation, Engineering
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$25.00
Weems and Plath Rolling Parallel Plotter
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$35.00
Vintage SKALA PARALLEL RULE RULES RULER 17.75" with CASE Marine Navigation CLEAR
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$29.95
Weems & Plath Marine Navigation Parallel Ruler #141 (Aluminum Arms, 15-Inch)
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$78.98
Weems & Plath Marine Navigation Parallel Ruler (Brass Arms, 15-Inch)
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$58.89
Weems Navigation Protractor
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$30.00
MARINE NAVIGATION PARALLEL RULER 450 MM BRASS DIVIDERS
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$9.00
C-Thru Ruler Company Protector P-72 Plotter Combination 4" x 15"
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$39.00
Vintage ESCO Parallel Ruler for Navigation 15" Original Box
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$122.30
Brass Rolling Ruler, U.W.W. Makers Birmingham, Navigation, Engineering, 18" L
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$14.95
Vintage Folding Parallel Rule Transparent Blades Sestrel Nautical Drafting
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$17.95
1981 Harry Golub Nautical Plastic Ruler, Nautac
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$40.00
Vtg. Mayline Naval Navigation Drafting parallel Ruler Sheboygan, Wis. 18 in.
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$149.00
Paralel ruler in wooden box vintage with wooden handle and brass rollers
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$19.95
Vintage Weems and Plath Protractor Scale
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$24.99
C-Thru Ruler Company Protector P-7 Plotter Combination 4" x 15"
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$31.99
Weems & Plath Marine Navigation Parallel Ruler #141 (Aluminum Arms, 15-Inch)
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$34.99
Jewelry Clip Vise Holder Jewel Tool on Base
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$19.99
Weems & Plath Marine Navigation Parallel Ruler W/o Protractor Markings (15 Inch)
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$165.00
Vintage US Brass Parallel Rule
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$14.99
Vintage Set of Staedtler Mars 57140 A,B,C Drawing Curves
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$12.99
Maritime Navigation PARAGLIDE Protractor Plotter # 1450 P-71 C-THRU WITH MANUAL
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$12.50
Doctor Antique Paralllel Rule Appreciation Diploma
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$40.00
Early 1850s Parallel Rule, Elliott Brothers, 56 Strand, London
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$70.00
Maritime navigation brass rolling ruler
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$120.00
Antique CAP'T FIELD'S IMPROVED Nautical Drafting Parallel Rule Ship Boat Measure
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$15.99
Stanley London 2in Ruler
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$47.53
Weems & Plath Marine Navigation Parallel Ruler Without Protractor Markings (1...
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$80.00
Vintage Kenyon Model 28-2000 Rolling Parallel 14" Rule With Wood Case
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$39.99
Jewelry Clip Vise Holder w Magnifier Jewel Tool on Base
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$47.52
Simple folding rule. 20th century Simple folding Metro
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$269.99
Vintage WWII British Navy Brass Parallel Rolling Rule &box Maritime Naval 106100
