This is a collection of Chinese locks all bar one engraved.I believe that a number of them are of good age and the Korean fish lock is quite exceptional.I have seen similar locks to this one on Ebay for very high prices.All keys are present, one of the keys is a double key for two locks so all can be used.The Korean lock measures 10.5 cm with the locking bar being 5cm.The largest of the Chinese locks has a bar length of 4.5cm.