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Kingson Pocket Calculator (Simplex Slide Rule and Adder) | National Museum of American History
Vintage Kingson Pocket Calculator - Free Shipping | eBay
Kingson Pocket Calculator - Calculator - Computing History
Kingson Pocket Calculator - Calculator - Computing History
c.1960s KINGSON POCKET CALCULATOR, STYLUS INSTRUCTIONS & CASE, COMPUTING HISTORY | #472045115
