The Class CA-7 caboose represents caboose design, materials and construction just before the time that railroads began the process of eliminating the caboose from freight train operations.  No. 25400 was the first of one hundred Class CA-7 cabooses constructed by the Union Pacific.  The car is one of only three surviving Class CA-7 cabooses in Colorado.  The caboose retains nearly all of its original design and materials, both exterior and interior.