Originally introduced in 1963 as a student drum, the Ludwig Acrolite quickly became the choice of pro players in need of dry, cracking snare tone.Serial number 773517The “Baseball Style” Muffler Lever indicates it is from the early 1960’s. Later they switch to the “Puck” style lever.Features: Shell:Raw aluminum shell, gives this drum its distinct dry sound. Badge:Keystone Lugs:Eight “bow-tie” style Triple-flanged Sound:Bright, crispy, and dry, with a strong “crack”. It is versatile, works well with a wide variety of music styles. Many drummers consider the 1960’s models to be among the best-sounding Acrolites ever made.