StampNews.com got to know that Swiss Post introduced a new series of original stamps that have form and function of vinyl discs. This original stamp issue was already put into circulation.
A piece of music has been imprinted on the "record" part of the souvenir sheet using a special coating. When you take the circular, ready-for-postage stamp off the souvenir sheet and place it on your record player, it plays a brass band version of the Swiss national anthem.
Even if the stamp, which is suitable for franking, is detached from the miniature sheet, a specially engraved soundtrack still allows the miniature sheet to be played on a record player which is set to 33 rpm.