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<p>[QUOTE=&quot;Numbers, post: 582233, member: 11668&quot;]Those are actually a lot simpler to calculate, since the serialling system was quite different....&nbsp; The sheets were cut in half vertically before numbering, and then the six notes on each half-sheet were numbered consecutively from top to bottom.&nbsp; So all you have to do is divide the serial number by 6 and look at the remainder: if it&#039;s 1, the note should be from position A or G; if it&#039;s 2, B or H; and so on.</p><p><br /></p><p>There&#039;s no way to determine from the serial number whether a note will be from the left half of the sheet (A-B-C-D-E-F) or the right half (G-H-I-J-K-L), but it&#039;s also not completely random.&nbsp; If you look at consecutive runs of serial numbers, the next note after an F is nearly always an A, and the next note after an L is nearly always a G.&nbsp; So the BEP seems to have printed a bunch of consecutive numbers on left half-sheets, and then another bunch of consecutive numbers on right half-sheets, rather than mixing them.&nbsp; Unfortunately these bunches didn&#039;t come in standard sizes; near as we can tell, they may&#039;ve been based on however many notes the BEP was planning to print that day, or some such thing.</p><p><br /></p><p>The few surviving 12-subject uncut sheets typically have 12 consecutive serial numbers on them, with the numbering proceeding straight from position F to position G.&nbsp; Thus these sheets appear to have been handled specially and not numbered in the usual way.&nbsp; Some exceptional sheets (the Hawaii and North Africa $1&#039;s) have six consecutive numbers on each side with a gap of several thousand serials between the two sides; these are presumably representative of the BEP&#039;s usual numbering at the time.</p><p><br /></p><p>It should also be noted that the 1929 Type 1 Nationals were serialled differently, using sheet numbers, not note numbers.&nbsp; That is, on any given half-sheet, all six notes would have the *same* serial number (just with a different prefix letter on each).&nbsp; So obviously it&#039;s possible for any number to fall in any plate position on these notes....&nbsp; But the Type 2 Nationals switched to the same system as all other currency, so the divide-by-6 rule works for them.</p><p><br /></p><p>Incidentally, this calculation works for nearly all large-size notes too, except with sheets of 4 rather than 6.&nbsp; Typically the plate positions were just A-B-C-D, though toward the end of the large-size era the BEP started using some 8-subject plates...the resulting sheets were cut in half vertically and then numbered in the same way as the 4-subject sheets, so positions E-F-G-H are equivalent to A-B-C-D respectively.&nbsp; Once again, though, Nationals were the exception; all large-size Nationals used sheet numbers rather than note numbers, so that the serial number and plate position are independent of one another.&nbsp; And a few early Gold Certificates were printed in sheets of 3 rather than 4, but those are pretty rare to run across....</p><p><br /></p><p>Hope this helps!&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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