I found it hard to get info on this metal works company but they are were  usa based and lasted from the late 1800s up to 1939 when it closed down, this company made many souviniers for the usa market using the old metal skills to make figurines and other pieces made from different metals.

I have a few of these and you can tell by the K & O logo stamped normally under the piece, in my research i saw that they did make book ends and many different versions can still be found on popular auction sites.

I have not yet researched the investment value of collecting k&o and wether they are worth buying yet so far the pieces i have collected have been of a high quality and they did put a little bit of subject matter into some of their works not just the standard.