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Vintage Reed-O-Graph Teacher Calculator 1940s Round Slide Rule for Grading Students - Circular Teachers Aid for Test Scores Averaging Grades

Vintage Reed-O-Graph Teacher Calculator 1940s Round Slide Rule for Grading Students - Circular Teachers Aid for Test Scores Averaging Grades

Keuffel Esser slide rule 4055 Mannheim with 4053-35 case Brown Sharpe calipers

Keuffel Esser slide rule 4055 Mannheim with 4053-35 case Brown Sharpe calipers

Tapetes Jovita,Crochet Doily,Crochet Patterns,Crochet Goodies,Slide Rule, Slipstick,480 564,600 705,Belíssimo Kit

Phillip Potter uploaded this image to 'Boats/Drawings'.  See the album on Photobucket.

Phillip Potter uploaded this image to 'Boats/Drawings'. See the album on Photobucket.

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