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A second version of the system, called "''[[speedline]]''", was produced starting from [[1937]], in which the realization was simplified by eliminating the locking system. This involved a longer bottom, but was advertised for the possibility of filling with one hand (in fact, to unscrew the bottom you still use two). Since [[1942]] about the system was further revised (with the version called "''[[speedline|wartime]]''" by collectors) using a button in celluloid instead of aluminum.<noinclude>
==Related Patents==
{{ListsPatentsFeature|Vacumatic filler}}
[[Category:Translated Pages]]
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