Vintage fountain pens combine mechanical condition, material stability, historical variation and collector demand. Document first, identify second, and intervene only when construction is understood.
1. Flex is not a binary feature
Flex is not a binary feature should be evaluated in context rather than as a single yes-or-no feature. Record what you can observe, distinguish confirmed facts from assumptions, and avoid operating an unfamiliar mechanism merely to test it.
2. Tipping and tine alignment matter
Tipping and tine alignment matter should be evaluated in context rather than as a single yes-or-no feature. Record what you can observe, distinguish confirmed facts from assumptions, and avoid operating an unfamiliar mechanism merely to test it.
3. Springing can be permanent
Springing can be permanent should be evaluated in context rather than as a single yes-or-no feature. Record what you can observe, distinguish confirmed facts from assumptions, and avoid operating an unfamiliar mechanism merely to test it.
4. Writing samples need context
Writing samples need context should be evaluated in context rather than as a single yes-or-no feature. Record what you can observe, distinguish confirmed facts from assumptions, and avoid operating an unfamiliar mechanism merely to test it.
5. Pressure should remain controlled
Pressure should remain controlled should be evaluated in context rather than as a single yes-or-no feature. Record what you can observe, distinguish confirmed facts from assumptions, and avoid operating an unfamiliar mechanism merely to test it.
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