Announced January 29th:
“The Postal Service honors the nation’s brave and loyal military working dogs with this new booklet of 20 stamps. Each block of four stamps features one stamp of each of the following breeds — German shepherd, Labrador retriever, Belgian Malinois and Dutch shepherd — that commonly serve in America’s armed forces. The background of each stamp features a detail of a white star. A star appears in the center of each block. The stylized digital illustrations are in red, white, blue and gold to represent the American flag and patriotism. The art was created by DKNG Studios. Art director Greg Breeding designed the stamps.”

Further updates will appear below, in order announced.

Updated March 29th:
These stamps will be issued Thursday, August 1, in Omaha, Nebraska, coinciding with the first day of APS StampShow 2019 in that city.

From the June 20th Postal Bulletin:

On August 1, 2019, in Omaha, NE, the United States Postal Service® will issue the Military Working Dogs stamps (Forever® priced at the First-Class Mail® rate) in four designs, in a pressure-sensitive adhesive commemorative booklet of 20 stamps (Item 680300). The stamps will go on sale nationwide August 1, 2019, and must not be sold or canceled before the first-day-of-issue. The Military Working Dogs booklet of 20 stamps may not be split and the stamps may not be sold individually.

The Postal Service™ honors the nation’s brave and loyal military working dogs with this new booklet of 20 stamps. Each block of four stamps features one of each of the following breeds serving in America’s armed forces:

• German shepherd,
• Labrador retriever,
• Belgian Malinois, and
• Dutch shepherd.

The background of each stamp features a detail of a white star. A star appears in the center of each block. The stylized digital illustrations are in red, white, blue, and gold to represent the American flag and patriotism. The art was created by DKNG Studios. Art director Greg Breeding designed the stamps.

Availability to Post Offices: Item 680300, Military Working Dogs (Forever Priced at the First-Class Mail Rate) Commemorative Booklet of 20 Stamps: Stamp Fulfillment Services will make an automatic push distribution to Post Offices of a quantity to cover approximately 30 days of sales.

How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at usps.com/shop. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

FDOI – Military Working Dogs Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

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 up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by December 1, 2019.

Technical Specifications:

Issue: Military Working Dogs Stamps
Item Number: 680300
Denomination & Type of Issue: First-Class Mail Forever
Format: Commemorative Booklet of 20 (4 designs)
Series: N/A
Issue Date & City: August 1, 2019, Omaha, NE 68108
Art Director: Greg Breeding, Charlottesville, VA
Designer: Greg Breeding, Charlottesville, VA
Typographer: Greg Breeding, Charlottesville, VA
Artist: DKNG Studios, Los Angeles, CA
Modeler: Sandra Lane/Michelle Finn
Manufacturing Process: Offset
Printer: Banknote Corporation of America
Press Type: Alprinta 74
Stamps per Booklet: 20
Print Quantity: 150,000,000 stamps
Paper Type: Phosphor Tagged Paper, Block Tag
Adhesive Type: Pressure-sensitive
Processed at: Banknote Corporation of America
Stamp Orientation: Horizontal and Vertical
Image Area (h x w): 1.085 x 1.42 in./27.559 x 36.068 mm
Image Area (w x h): 1.42 x 1.085 in./36.068 x 27.559 mm
Stamp Size (h x w): 1.225 x 1.56 in./31.115 x 39.624 mm
Stamp Size (w x h): 1.56 x 1.225 in./39.624 x 31.115 mm
Full Booklet Size (w x h): 12 x 4 in./304.8 x 101.6 mm
Press Sheet Size (w x h): 24 x 12 in./609.6 x 304.8 mm
Colors: 8382 Gold, Cyan, Magenta, Yellow, Black
Plate Size: 240 stamps per revolution
Plate Numbers: “B” followed by five (5) single digits
Marginal Markings: Cover: USPS logo • Twenty First-Class Forever stamps • MILITARY WORKING DOGS • Barcode • Plate number in fold • ©2019 USPS in fold • Promotional text in fold