Considering the total opacity of the sheet & the big thickness it is doubtful that the print (not washi)is an original of the date indicated 1830. Seller confirmed he has no evidence of authenticity.
Προβολή μετάφρασηςI am sorry. I'm sorry you are not satisfied. I regret the last sentence written: I have a different opinion and arguments. As written in the email, almost all of the prints have no proof of authenticity (anyone can verify, even on Catawiki); to obtain proof from an authorized certifier, between shipments and parcel, a few hundred euros must be added to each lot. The print (as written and photographed in the lot) is supported; the backing paper (not washi) was, many years ago, perfectly glued to the original; you can see in the top right corner a leak (also described) where you can see the overlap. I'm sorry that you (kindly and after my request) proposed a solution, and I (after a favorable response from the experts) accepted dialogue... I'm still waiting for a response. I didn't have to wait for feedback though.