555: Difference between revisions
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Early instances of the 555 came with | Early instances of the 555 came with | ||
the 21 and 22 horizontal plug-ins. | the 21 and 22 horizontal plug-ins. | ||
A rigid plug-in extension for the timebases (part number 013-013) | A rigid plug-in extension for the timebases (part number [[013-013]]) | ||
was included with every 555. | was included with every 555. | ||