Vintage Chinese Traditional Cabinet or Chest Lock & Key Black Lacquer 4.5"

This is a vintage Chinese traditional brass lock & key for a large chest, cabinet or wardrobe. Is it made of iron and is finished in a black lacquer or enamel.  It is still operational with included key (see pictures).

With exception of minor signs of past use, (minor oxidation, and an aged patina) this lock remains in overall very good condition. It measure 4 1/2" wide by 2" tall by 1 1/8" thick (14 x 5 x 3 cm).