Here is a vintage Lot of 5 Lacquer Cups Marked CPO which were made In Japan after World War 2.  From my research CPO on the underside is translated as ‘Central Purchasing Office’. This mark was used to indicate items sold during the occupation just after WWII. The cups are in good shape with no damage, just some wear that you may see in the pictures.  Pictures should tell you a lot about the condition of the cups.  Thanks for looking good luck and happy bidding.  Payment within 5 days please.