| European Typewriter Project: LINKS page |
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| Links to and from the vast universe of typewriter enthusiasts the world over. Link categories sorted by content; reciprocal links appreciated. |
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| Typewriter Serial Number Database, by Dirk Schumann. Available in both English and German; a very thorough listing of serial numbers of common and uncommon machines, and also a compilation of known production dates of machines where serial numbers are not known. Possibly the most often-used research tool on the internet. |