Parcelforce Global Express or Priority? Compensation up to £2,500 (additional charge) - not sure how much they charge though.... ..... http://www.royalmail.com/business/servi ... ss-parcels
Or if one of the watches is priced up to £250 you could split them and send one via International Standard... ....
http://www.royalmail.com/business/servi ... d-delivery