Friden SRQ Automatic Square Root Demo

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Friden SRQ - First Mechanical Calculator with Automatic Square and Square Root

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Mechanical Calculator approximating Pi | Friden STW-10

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Friden STW-10 Plays the Friden March

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Computing Square Roots by Subtraction on a Walther WSR 160 Mechanical Calculator

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Using the Friden STW-8

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Friden SBT10

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Friden DW10 Electro-Mechanical Calculator

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Early Friden Model S Mechanical Calculator Repair/Demo (Green Case, pre-1940)(With Carriage Rebuild)

(1:59:50)

Friden Model S10 Mechanical Calculator Repair

(37:22)

Fixing a Friden Model F with Paperclips??!?

(1:7:42)

Friden C10 Calculator - 1935

(4:45)

The Friden March

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FRIDEN Electro-Mechanical Calculator Performing SQUARE ROOTS

(8:45)

Friden STW10 Can It be Saved Part 1

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Random Calculation on a Friden STW10

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Friden STW10 with Animal Nest of Indeterminate Origin

(1:31:19)

Friden EC 130 Calculator Review (First Solid State Calculator)

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