Does anyone know about 'Country of Origin' and 'Parts Breakdown' for Customs, Please

[THFlesher]

Does anyone know anything about used watches getting through customs? I purchased a gold 16528 and a 116610 from store in Switzerland and today I was told there is paperwork missing to clear the watches from customs. They said they need a breakdown of parts with a country of origin and value. What does a document like this look like? Can I make one myself or is this an official piece of paper work? It's a holiday in Switzerland, so the shop is closed today. Normally, I wouldn't be in such hurry, but the 16528 is a retirement gift and the party is Friday. The watches were both marked used by the way. So how do I get these watches to clear customs? Any help is very much appreciated.