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<p>[QUOTE=&quot;Numbers, post: 496485, member: 11668&quot;]Yep.&nbsp; The 1950-dated notes were printed on the BEP&#039;s older 18-subject-sheet wet-intaglio presses, while the 1963-dated notes were printed on the then-new 32-subject-sheet dry-intaglio presses.</p><p><br /></p><p>The two different sheet sizes required different serial numbering conventions, so during the transition period when both types of presses were in use, the BEP just used completely separate series years and serial sequences for the two styles.&nbsp; That&#039;s why Series 1950E is so scarce: by the time the Granahan-Fowler signatures came along, almost all of the old presses had been retired, so the vast majority of Granahan-Fowler notes were 1963A (from the new presses) rather than 1950E (from the old presses).</p><p><br /></p><p>Incidentally, the BEP is now in the process of replacing those now-aging 32-subject presses with spiffy new models that&#039;ll be able to print even larger 50-subject sheets.&nbsp; This time around, though, they&#039;re designing the new presses to be capable of handling the current 32-subject size sheets as well.&nbsp; That way, they can just keep printing everything in sheets of 32 until they&#039;ve finished installing *all* the new presses, and then make the changeover to the new sheet size all at once.&nbsp; So we won&#039;t have to deal with the confusion of two different series designations running concurrently....&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie6" alt=":cool:" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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