Notice anything different about this booklet? The serial number is not in the normal location. It also appears to be a different font. Other booklets show the serial number in the correct location. According to Bulletin #46 from the Philatelic service, this was an inadvertent error. Both varieties of the third printing are offered for sale at $8.60 directly from the philatelic service. I guess they wanted to avoid speculation. In addition to these varieties of the third printing, it appears a fourth printing is now available.