The Model 1816 Musket was the primary infantry long arm during the Mexican War. This musket was coverted to percussion by Hewes and Phillips of Newark, New Jersey e. 1861-62. It has the bolster type percussion conversion, fixed blade front sight and three leaf rear sight (one leaf is broken). The lock plate is marked "SPRING / FIELD / 1832" vertically behind the percussion hammer and the "eagle / shield / U.S." marking in front of the hammer. The stock is the correct full length military version with no visible markings. The side of the bolster is marked "H&P". "US" marked on the buttplate tang, "S" marked side plate and "DP" marked ahead of the trigger guard with "P / eagle head" proofs on the left side of the barrel and "1862" on top. It has a replacement iron trumpet head ramrod. A good example of a Civil War percussion conversion musket.