Model 1847 Sappers Musketoon Bayonet - Type 1 

Type 1 bayonets were made with a V shaped fuller running down the middle of the blade on both sides.  

The initial 200 produced for the first contract plus approximately 50 produced for the second contract for a total of about 250 were produced.  The second contract for 300 had instructions to eliminate the fuller after existing stock was used up.  A letter from the Ordnance Office to Ames suggests there may have been as many as 50 existing blades with fullers.   The first contract bayonets were stamped U.S. and R.C. (Inspector Rufus Chandler) on the reverse ricasso and the obverse ricasso was stamped N.P. AMES / CABOTVILLE with no date.

Model 1847 Sappers Musketoon - Type 2A

Type 2A bayonets consist of those produced for the second contract with a blade fuller estimated to be around 50.  The second contract bayonets were stamped U.S. over N.W.P. (Inspector Nahum W. Patch) on the reverse ricasso and the obverse ricasso was stamped N.P. AMES / CABOTVILLE / 1847 with a larger die stamp.   The upper quillon disk is stamped RC (Inspector Rufus Chandler) on the reverse side.  

Model 1847 Sappers Musketoon Bayonet - Type 2B

Type 2B bayonets consist of those produced for the second contract without a blade fuller estimated to be around 250.  The second contract bayonets were stamped U.S. over N.W.P. (Inspector Nahum W. Patch) on the reverse ricasso and the obverse ricasso was stamped N.P. AMES / CABOTVILLE / 1847 with a larger die stamp.   The upper quillon disk is stamped RC (Inspector Rufus Chandler) on the reverse side. 

Model 1847 Sappers Musketoon Bayonet - Type 3

Type 3 bayonets consist of those produced for the third and fourth contracts.  Like the Type 2B bayonets, the blades are without fuller.  The brass hilt hand guards are straighter across then the downward turned Types 1, 2A and 2B.  The pommel flat is stamped with inspector initials of A.D.K (A. D. King) and R.H.K.W. (Robert Henry Kirkland Whiteley).  The blade ricassos are stamped U.S. / A.D.K. / 1855 on the reverse and AMES MFG CO / CHICOPEE / MASS on the obverse.