Scarce Beautiful Colt Model 1892 New Army/Navy First Year of Production 38 Colt Double Action Revolver Spanish American War "Key Stone Battery" Presentation Marked Serial Number: 576 in very good condition with a bright and defined bore. The action appears to function properly with minimal wear to the original blue finish. This gorgeous revolver sports 98-99% original blue finish and maintains its original factory heat treated blue on the hammer and trigger which is quite rare since majority of revolvers have it worn off. The cylinder has tight lock up and sports a nice original pair of period correct Colt factory grips. The revolver appears to have been a presentation piece to an H. Nelson Burroughs of Battery A. Pennsylvania Volunteers. Light Battery A, Pennsylvania Volunteer Artillery better known as the Keystone Battery was a longstanding unit of the Pennsylvania National Guard based in Philadelphia. When the United States declared war on Spain in April 1898, Battery A became the very first Pennsylvania volunteer organization mustered into federal service. Under the command of Captain Barclay H. Warburton, the battery comprising four officers and 78 enlisted men was officially enrolled and mustered in at Mount Gretna on May 6, 1898. Equipped as light artillery, the unit reflected the rapid mobilization of state militia forces to support America's emerging role as a global power during the brief but decisive conflict. Deployed to Puerto Rico (a Spanish colony at the time), Battery A performed garrison, training, and support duties but saw no combat due to the swift armistice signed on August 12, 1898. The war's short duration meant most volunteer units, including this one, returned home without engaging the enemy. Battery A was mustered out of federal service on November 19, 1898, in Philadelphia after roughly six months of active duty. Its early mustering and overseas service distinguished it among Pennsylvania's contributions to the war effort, which totaled nearly 17,000 men and helped secure U.S. control of Puerto Rico, Guam, and the Philippines while granting Cuba independence from Spain. This is a high quality almost pinacol piece for any Colt collection.