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  DSC04357.JPG - These calculators were made by Lucie Meuter (see L and M in the logo) in East Berlin (DDR) up to 1968 ! Sliding rod calculators were very common during the 20th century up to the 1970's. Smaller models had to be flipped over to when changing from addition to subtraction.  
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These calculators were made by Lucie Meuter (see L and M in the logo) in East Berlin (DDR) up to 1968 ! Sliding rod calculators were very common during the 20th century up to the 1970's. Smaller models had to be flipped over to when changing from addition to subtraction. Download
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