Visor to crown 4 1/2 in. dark blue wool felt forage cap, tarred and bound leather visor, leather chinstrap with 17 mm brass eagle "I" infantry buttons, leather sweatband, brown polished cotton lining (mothing, light soil, chinstrap leather stiff with tear at left buttonhole); width 3 in. die-struck gilt brass infantry horn (some tarnish); height 1/2 in. die-struck brass regimental number "9" placed in horn loop; approx. height 3/4 in. silver company letter "F" above insignia and height 5/8 in. specially produced regimental letters "N H V" (minor surface wear).

This hat is published on page 133 of Langellier & Loane, U.S. Army Headgear, 1812-1872, alongside two other New Hampshire kepis with the same distinctive silver regimental letters.

The 9th New Hampshire Infantry Regiment was organized in Concord, NH and mustered in on 15 August 1862. They saw extensive service in the Eastern Theater seeing action at Antietam, Fredericksburg, Vicksburg, the Overland Campaign (including the Wilderness, Spotsylvania Court House, and Cold Harbor), the Siege of Petersburg, and the Appomattox Campaign. They mustered out of service on 10 June 1865.