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| View into the open bottom of the machine, put on its side. Notice the hardened yellow grease covering part of the gear. Old sticky grease is one of the most common causes of a not functioning vintage mechanical calculator. | |
| Total images: 11 | Help | |
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| View into the open bottom of the machine, put on its side. Notice the hardened yellow grease covering part of the gear. Old sticky grease is one of the most common causes of a not functioning vintage mechanical calculator. | |
| Total images: 11 | Help | |