The chair was manufactured by Lingel Karoly and Sons in the year 1915. It has a very strong construction and quality materials were used in its production. The chair was restored 7 years ago and has not been used since. It is one of most iconic Hungarian chair designs of the 20th century. A Hungarian post issued a stamp depicting the Lingel chair. The same model of the chair is in the collection of the Museum of Applied Arts, Budapest, Hungary. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution