P271 BRITISH SLIDE RULE. VERY GOOD CONDITION. specifications and physical condition.
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BRITISH Thornton Slide Ruler No P271 Sin Tan Log Rule Collectable with Case
Good condition. Would benefit from a light clean.
Vintage Frederick Post Company Slide Rule in Original Plastic Case Post 1445P
Slide Rule. This slide rule is in excellent condition with no. in Original Plastic Case. written word. Use the magnification tool and feel. The plastic. chip, blemish, stain, bump, open air bubble, crazing.