Classic Yaban S410 BMX chain
Yaban was original equipment on many bikes in the 1980's (for instance, I had a 1987 Schwinn Freeform EX with this same Yaban chain in blue/nickel.)
Color: PURPLE outer links / NICKEL inner links (with nickel master link)
Size: 1/2" X 1/8"
Model #: S410
Brand new in the package, never installed, with the original retail packaging.