~ 1 Original J. DeChristpher Military Equipmemt & Firearms Parts Catalog published in 1974.  This was my grandfathers catalog for many years.  While the prices are no longer valid and all the equipment is gone it makes a great reference guide for US Martial parts & equipment identification.  Over 50 pages of valuable information and great photographs for any US Military collector!  I don't have many of these original printings left!