USPS supplied image.

42¢ Flags of our Nation - Set 2
(Sennett Security Products)
Self Adhesive Coil of 50
Scott # 4292b 4283 District of Columbia (The plate number S111111111 is on this stamp)
4284 Florida flag
4285 Georgia flag
4286 Guam flag
4287 Hawaii flag
  Strip of 5, #4287a
4288 Idaho flag
4289 Illinois flag
4290 Indiana flag
4291 Iowa flag
4292 Kansas flag
  Strip of 5, #4292a
  Plate # strip of 10, #4287a + 4292a (may be collected as 1 strip of 10 or 2 separate strips of 5)
  There is also an unnumbered listing for a plate number strip of 11, with the plate number centered.
Series USPS - NA ~ PNC3 - Flag / Patriotic
Issue Date & City September 2, 2008, Washington, DC 20066 (Hall of Flags lobby at L’Enfant Plaza Postal Service Headquarters)
Nationwide Sale September 2, 2008
Designer Howard E. Paine, Delaplane, VA
Art Director Howard E. Paine, Delaplane, VA
Typographer Howard E. Paine, Delaplane, VA
Artist Tom Engeman, Brunswick, MD
Modeler Donald Woo
Engraver Southern Graphics, Richmond, VA
To Press / Initial Quantity Spring 2008 / 500 Million stamps
Coil Size 50
Printer American Packaging Corporation / Sennett Security Products (SSP)
Press Cerrutti, 950
Process Gravure
Where Printed Columbus, WI
Where Processed Unique Binders, Fredericksburg, VA
Plate Size & Interval 760 stamps per revolution / plate # every 10 stamps
Paper Type Prephosphored, USPS Type II, Surface Coated
Adhesive Type Pressure Sensitive
Tagging Type Prephosphored - Surface Tagged. Almost smooth appearance with some uneveness.
Die Cut Gauge Serpentine Die Cuts - 11.1 Vertically - 13 x 13 Peak/Valley
Colors Magenta, Yellow, Cyan, PMS 5415 (Grey), Black, PMS 4625 (Brown), PMS 3425 (Green), PMS 187 (Red), PMS 2945 (Blue),
Image Size (w x h) 1.74 x 0.96 in. / 44.20 x 24.38 mm
Overall Size (w x h) 1.59 x 0.81 in. / 40.41 x 20.57 mm
Back Numbers None
Earliest Known Use September 2, 2008
USPS Order Numbers 786640 Full Coil of 50 - $21.00
786663 First Day Cover - Set of 10 - $8.00
Availability  
Official Announcement On September 2, 2008, in Washington, DC, in the Hall of Flags lobby at L’Enfant Plaza Postal Service Headquarters, the Postal Service™ will issue 42-cent definitive stamps Flags of Our Nation in ten designs, in a pressure-sensitive adhesive (PSA) coil of 50 (Item 786600). Designed by Howard E. Paine of Delaplane, Virginia, the stamps go on sale nationwide September 2, 2008.

This is the second set of the multi-stamp series featuring the flags of the District of Columbia, Florida, Georgia, Guam, Hawaii, Idaho, Illinois, Indiana, Iowa, and Kansas. The first set of ten stamps (Item 786500) was issued June 14, 2008.

Press Release Click here to read the press release.
Note Shipped to post offices in sticks of up to 10 coils.
How to Order the First Day of Issue Postmark
Customers have 60 days to obtain the first day of issue postmark by mail. They may purchase new stamps at their local Post Office™, at The Postal Store Web® site at www.usps.com/shop, or by calling 800-STAMP-24. They should affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:
FLAGS OF OUR NATION STAMPS
POSTMASTER
SPECIAL CANCELLATIONS
PO BOX 92282
WASHINGTON DC 20066-9998
After applying the first day of issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark. All orders must be postmarked by November 3, 2008.
How to Order First Day Covers
Stamp Fulfillment Services (SFS) also offers first day covers for new stamp issues and Postal Service stationery items postmarked with the official first day of issue cancellation. Each item has an individual catalog number and is offered in the quarterly USA Philatelic catalog. Customers may request a free catalog by calling 800-STAMP-24 or writing to:
INFORMATION FULFILLMENT
DEPT 6270
US POSTAL SERVICE95954">
PO BOX 219014
KANSAS CITY MO 64121-9014
Philatelic Products
There are three philatelic products available for this stamp issue:
  • 786663*, First Day Cover (set of 10), $8.00.
  • 786668*, Digital Color Postmark (set of 10), $15.00.
  • 786691*, Ceremony Program, $6.95.
Items with an asterisk (*) will use the 128 barcode from SFS. All other philatelic products will continue to use barcode series A, with the exception of the Yearbook and the Guide Book.
Distribution: Item 786600, $21.00 Flags of Our Nation PSA Coil of 50 Stamps (Set 2)
All stamp distribution offices (SDOs) will receive an automatic distribution of the $21.00 Flags of Our Nation PSA coil of 50. Distributions are rounded up to nearest master carton size (800 coils).
Initial Supply for Post Offices
SDOs will not make a subsequent automatic distribu­tion of Item 786600 to Post Offices. All Post Offices requir­ing quantities of Item 786600 must order them from their designated SDO using a separate PS Form 17, Stamp Requistion/Stamp Return. SDOs must not distribute coils to Post Offices before August 27, 2008.
Additional Supply
Post Offices requiring additional 786600 must requisi­tion them from their designated SDO using PS Form 17. SDOs requiring additional coils must order them from the appropriate accountable paper depository (APD) using PS Form 17. For fulfilling supplemental orders from SDOs, the Memphis, Chicago, New York, and San Francisco APDs will each receive 422,400 additional coils. The Kansas City Stamp Service Center (SSC) will receive 614,400 additional coils for fulfilling supplemental orders from APDs.