Warm-up is an original drawing in pencil, on creamy-colored paper realized by Norbert Meyre in the early 20th Century. Good conditions except for foxings. The artwork is depicted through deft strokes by mastery. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution