Its from a 1890s secretary drawer. The shape is reminiscent of a warded key, except it has this pin at the top that I have never seen in a lock. The key would have to have a corresponding hole, which no modern warded key I know of has.
Where can I get a key like this and what is it called?
Looking closely at the photo, it looks like the pin at the top has been sheared off and might be part of the key that got stuck in the lock.
I don't think it is, the secretary has other key holes with the same pin. The only difference is that this one also has this warded-lock-type shape