| Thumbnail |
 |
| Catalog Number |
3909a |
| Description |
American Scientists - Block of 4 |
| Denomination |
4 @ 37c |
| Color |
Multicolored |
| Variety |
2005 US Commemorative Issue |
| Printer |
Banknote Corporation of America, Inc. |
| Years |
2005 |
| Sorter |
5163 |
| Ebaylink |
http://www.ebay.com/csc/United-States/261/i.html?_armrs=1&_from=R40&_pcats=260&LH_Complete=1&LH_Sold=1&_nkw=%233909a+American&_sop=16 |
| HiRes |
 |
| Type |
Reg |
| Detlink |
https://stampsmarter.org/PNT/watermark/nowatermark.jpg |
| PicDetlink1 |
https://stampsmarter.org/PopupStampId/PB.aspx?ScottNumber=3909a |
| Date Issued |
5/4/2005 |
| Perforation |
SDC 10¾ |
| Watermark |
Unwatermarked |
| Num Produced |
50 million stamps |
| Paper |
Phosphor Tagged |
| Printtype |
SSP Offset |
| Gum Type |
Self Adhesive |
| Series |
American Scientist |