The 110 handle was done in antler, lignum vitae, melamine and black phenolic all with barrel nut accompanied w/ a brown sheath. THE 103 model handle was done in melamine and black phenolic with barrel nut accompanied w/ a black sheath. The model number changed to 103 sometime in 1962 or 63. The tang pin configuration came about in May 1963 and the white melamine was dropped at about this time. Without the sheath it would be hard to determine. DM