Please note that for USPTO filing purposes in the case of goods a trademark specimen should be a tag, label, packaging or container for the goods or a display associated with the goods. (advertising material or copies of invoices are generally not acceptable as a specimen for goods. Any material , whose function is merely to tell the prospective purchaser about the goods or to promote the sale of the goods is unacceptable to support trademark use)
in due course let us know the client's date of first use anywhere in the world and of the trademark in US commerce