Amunhotep III
Gilded wood, 10 3/8 in. (26.3 cm) Base: 6 5/16 x 1 1/16 x 2 3/8 in. (16 x 2.7 x 6 cm)
New Kingdom, Dyn. 18, ca. 1390-1352 B.C.E.
Provenance not known, possibly from Thebes
Charles Edwin Wilbour Fund, Brooklyn #48.28
Photo © Joan Lansberry, May 2008-2016

From the info card:
"The dynamics of permanence and change in Egyptian art are well reflected in this statuette of Amunhotep III. The form of the striding male figure dates back to as early as Dynasty 3 (circa 26752625 B.C.). The Blue Crown, an element of iconography, did not appear until right before Dynasty 18 (circa 1539 B.C.), more than one thousand years later. The style was completely new: unlike most Egyptian kings, Amunhotep III allowed himself to be portrayed as an aging man with a noticeable paunch and sagging jowls."

The Blue Crown has a unique texture:

Fragment of Blue Crown
Faience, (ground quartz, alkaline binder, glaze), 2 13/16 x 2 5/8 in. (7.2 x 6.7 cm)
New Kingdom, Amarna Period, reign of Akhenaten-Tutankhaten (ca. 1352-1329 B.C.E)
Excavated from Tell el Amarna, Egypt
37.409, Gift of the Egypt Exploration Society
Photo © Joan Lansberry, May 2008-2016

From _Art for Eternity_, Glossary, page 157
"The khepresh, or Blue Crown, often incorrectly termed the 'war crown',' was associated with coronation, legitimacy of rule, royal renewal, and victory. Similar to a tall helmet in appearance, it was often adorned with disks."

© Jeff Dahl via Wikipedia

Wikipedia declares, "Amenhotep III was apparently the first king to be depicted wearing the Blue Crown,[5]" and cites "Karol Mysliwiec, _Eighteenth Dynasty Before the Amarna Period_, Brill 1985, p.27" as the source.