Model identification guide: The Lockdowns |
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![]() By using a diaphragm rather than a sac, the whole barrel could be used as a reservoir. The principle workings was essentially like that of the earlier button fillers as the depression of the plunger pushed on the rubber sac and forced out the air (creating a vacuum) and when the rubber regained it's natural form the ink got sucked into the pen to replace the air. ![]() Click on the imprint that looks like Yours! |
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