Sealed letter from the 17th century has been read for the first time WITHOUT opening it

The first of its kind experiment allows the Renaissance letter, from the Dutch postal museum collection, to be read without damaging the paper or breaking the seal. https://www.dailymail.co.uk/sciencetech/article-9316119/Sealed-letter-17th-century-read-time-WITHOUT-opening-it.html?ns_mchannel=rss&ns_campaign=1490&ito=1490