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CURTA Calculating Machine Model I, 8x6x11 Service Manual - ring binder type Colombini Acto - six rings |
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Biella Colombini Acto - No 3422 C - (Biella AG, Switzerland) - 1944-1952 |
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Biella Colombini Acto - Advertisement - Schweizerische Lehrerzeitung 1944 |
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Katalogseite der Firma BIELLA |