Description: TITLE: 1964 Vtg CERTAIN-TEED Pressure Pipe Calculator / Slide Ruler / Paper Calculator FEATURES: ITEM: Vintage CERTAIN-TEED Slide Rule / Paper Calculator DESCRIPTION / USE: Calculator / Slide Rule Used for Pressure Pipe Calculations / Advertising OF NOTE: Double SidedBRAND: CERTAIN-TEED Products Corp. CALCULATOR / CHART MAKER: Perry Graf Slide Rules CIRCA / AGE: 58 Years / 1964SIZE: 8.5"x 3.5" MATERIAL: Cardboard / Paper CONDITION: Preowned but in Good Working Condition COUNTRY OF MANUFACTURE: United States HISTORY: William Oughtred is credited as the inventor of the slide rule when he discovered that if you basically took two logarithmic scales and put them together next to each other you could multiply & divide by adding the logarithms together. William Oughtred lived from 1574 to 1660. In the 1970's the slide rule (Paper Calculator) was replaced by electronic calculators and ultimately these handheld calculator where replace by the modern computers. SELLERS NOTES: Please examine all photographs prior to purchase Sold as pictured. Thanks for looking!SKU: 144-MSC Date Listed: 06/05/2023
Price: 19.99 USD
Location: Sequim, Washington
End Time: 2024-04-06T00:06:32.000Z
Shipping Cost: 3.99 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Country/Region of Manufacture: United States
