Battousai
06-30-2013

Thats probably for maritime, not merchant chest.

Claudia
06-30-2013

Pillage Order x10

ReaD
06-30-2013

Bell of Withdrawalx20
Request Investment Bookx15
Fine Tribute Goods (Large Ships)x3
Fine Tribute Goods (Mid-size Ships)x3
Fine Tribute Goods (Small Ships)x3
Tribute Goods for Brigandsx15
Ceasefire Agreementx25
Renegotiation Demandx5
jap wiki..2500 roman coin needed

Guilder
07-20-2017

A counterpart to this item is the Merchant Advanced Award 2, sold for 3500 Roman Coins. Not sure what the contents are in GAMA, but here's a list of possible drops from the Japanese UWO wiki:

Fine Fur x5
Fine Ruby x5
Fine Dye x5
Fine Peacock Feather-Work x5
Pure Iron Sheet x5
Smoke Bomb of Retreat x5
Memorandum of Secret No-war Pact x5
Mogul's Secret
First class Tea Merchant Permit
Cat Ornament
Bamboo Broom

If anyone finds out what it actually contains, please do share your findings with us. Cheers.

Source: gvo.gamedb.info/wiki/?Colosseum