Velholdt ambrotypi i læderrammeHeight 7 cm. Width 6. 5 cm. Extremely well preserved ambrotype from the mid 19th century. Ambrotype is one of the first forms of photography, made on glass plates coated with collodion and later dipped in silver nitrate. They are very light sensitive, hence the frame that closes like a book. We have never seen such a well preserved ambrotype before. The technique was patented by James Ambrose Cutting in 1854. The frame has an older repair on the back