See scans. Registered bank cover mailed December 28, 1922 from Luebeck to Berlin, Germany. On the back is a Berlin receiving cancel. This is commercial mail opened on three sides (top, left side, and right side).

Buyer pays actual postage to ship (US $0.92 to the United States, or $1.55 airmail to Canada, or $2.80 airmail to other countries). Combined shipping is the actual postage to ship. POSTAL INSURANCE (available only on mail to the United States) is provided by the Seller on shipments where the (combined) purchase totals $90.00 or more. The cost for POSTAL INSURANCE varies on purchases less than $90.00 and this service is optional. REGISTERED MAIL is provided by the Seller on shipments worldwide where the (combined) purchase totals $150.00 or more. REGISTERED MAIL may be required depending upon the shipping destination. A discount is offered on REGISTERED MAIL based on the total amount of your purchase. 

If you are the winning bidder on more than one item, please wait for or request a combined invoice.