This is a listing for a rare Leica CL and genuine thumb rest for the Leica M typ 240. This item is unused and was acquired directly from a Leica store that has closed. Although it is unused, there may be slight scratches due to long-term storage. It needs to be inserted a little firmly when attaching, but I have confirmed that it can also be attached to the Leica M10. Unused Leica Leica CL Leica M typ 240 thumb rest silver 19509 Can also be attached to Leica M10