Plain envelope to Luzern with a London Stamp Exhibition postmark 1928.Payments to be made within 7 days after auction closes by sterling cheque, instant paypal or British Postal Order . Overseas winners please wait on my invoice and payment to be by instant paypal only. I cannot be responsible for items going missing if you do not take the insured options. A certificate of posting is always obtained for all items posted, as proof that they have been posted. I shall combine postage as best as I can for more than one item bought. . g.