United States
usa-20180000-z-001
page = 1
Click here for higher resolution image
Width: 213 mm
Height: 275 mm
Location: 9 x 12 Portfolio #3
Stamp ID = 5657
United States Post Office publication, has information about the History of Hockey stamp (usa-20171020-s-001 & s-002) and the Washington Capitals cacheted envelope for their 2018 Stanley Cup win (usa-20180607-r-001).
There are 49 pages (1 page is a fold-over page) plus in the middle there is an order form.
From Linn's "Stamp Issuing Entities Of The World" page.
United States of America (1847-)
Stamp-issuing status: active; Population: 248,709,873 (1990). Republic occupying the central portion of North America, along with Alaska, Hawaii and a large number of island possessions in the Caribbean Sea and the Pacific Ocean.