Reference: http://www.angelfire.com/mb/lukegreatwar1917/Uniforms.html (excerpts) Model 1917 Tunic / Model 1918 Tunic The most common tunic worn by the American Doughboy in the Great War was the M1917 tunic. The differences in the M1918 are internal pockets, a full lining, and tapered shoulder straps or epaulettes. Construction: The M1917 had 4 patch pockets, standing color with holes punched for collar discs, interior fully lined. Cuffs had either one row of stitching roughly an inch or so from the bottom of the cuff, or no stitching at all. Wool Above are two samples of what the typical wool used in the M1917 tunics looked like. Note: Color and weave varied greatly in WW1 uniforms. This merely represents the most common. Photos can tend to misrepresent the "true" color".