Edward VIII Pair of French Wedding Covers

In 1937, Edward, The Duke of Windsor, formerly King Edward VIII, finally married Mrs. Wallace Simpson. They married in a chateau in France, we know because we bought the archives of that chateau. The only things made to commemorate that wedding some 87 years ago, were two photographic covers with French stamps. The British Royal Family shunned the wedding and no one was allowed to go. Many years ago, we bought a supply of these covers from a stamp dealer in New York City. Now, some 45 years later, we are about to run out of our supply of covers. We have seen they are priced much higher elsewhere, but we are still keeping our old price.