SID! (Vintage Silicon)
MOS6581 aka the SID chip as used in the CBM64... an absolute classic. This one was made in week 8 (late feb) of 1983 ("0883"), making it very nearly 25 years old. Yeah!
Part of the "It's never too late to have a happy childhood" project.
Sourced at www.arcadecomponents.com/index.html