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. Identify material first
Identify material first 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. Do not force the section
Do not force the section 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. Flush only appropriate systems
Flush only appropriate systems 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. Avoid household chemicals
Avoid household chemicals 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. Stop when resistance or instability appears
Stop when resistance or instability appears 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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