IBM PC Keyboards

IBM model F XT 83 key #1

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IBM model F XT 83 key #2

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process of cleaning 

IBM Portable PC  83 key

IBM Model F AT 84 key

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process of cleaning

IBM Model M XT/AT 101 key #1

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condition before restauration process

IBM Model M XT/AT 101 key #2

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IBM PS/2 Model M 101 key #1

IBM PS/2 Model M 101 key #2

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original condition