The Forecaster - Ovulation Prediction Slide Rule with Envelope For Sale



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The Forecaster - Ovulation Prediction Slide Rule with Envelope:
$9.99

Slide copyright 1948; holder copyright 1955Possibly never usedIn original mailing envelope


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2-vtg English Metric Converter Slides U.s. Dept Transportation Temperature Press picture
2-vtg English Metric Converter Slides U.s. Dept Transportation Temperature Press


Vtg Pickett Slide Rule Model N 902-t Simplex Trig W/ Sheath U S A  picture
Vtg Pickett Slide Rule Model N 902-t Simplex Trig W/ Sheath U S A


Vintage K&e Polyphase Slide Rule 4053-3 W Leather Case Keuffel & Esser Co. picture
Vintage K&e Polyphase Slide Rule 4053-3 W Leather Case Keuffel & Esser Co.


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