One of The first imaged X-ray

This image is very famous and it is sometimes found on radiological books,
It is one of the earliest X ray taken by German scientist called Roentgen on December-22-1895 ,
It was for his wife's hand and signet ring.
I don't know why he tried his experiment on his wife,
Although this image was taken more than 120 years ago
but the quality is not bad.

he named the invisible radiations as X-rays (or unknown rays)
Roentgen got the Nobel Prize in-1901