Vintage Chinese Koi Fish Cabinet or Chest Lock & Key Brass 3.5"

This is a vintage Chinese traditional brass lock & key for a large chest, cabinet or wardrobe. It has all of its original patina.  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 3 1/2" wide by 2" tall by 3/4" thick (9 x 5 x 2 cm).