Various designs exist but one that appears to be the same as yours sold here (need subscription to see the hammer price). Described as ‘bronze’, which looks right:
I don’t think there’s any particular connection between the three items above, except that the Dutch author Boudewijn Büch had an interest in wildlife from island habitats, particularly islands that were difficult to reach. He wrote a series of non-fiction books on that theme. His book “De Kleine Klonde Dood” however has nothing to do with dodos. It translates as “The Little Blonde Death” and is about a poet who unexpectedly becomes a single father.
Minelab SDC 2300, Makro Deephunter Pro 3D, OKM EXP 4500 Pro, Garrett Hand Held Detectors, Falcon MD 20, English dowsing springs, Darley Spanish Dip Needle, L-Rods, what’s left of my brain :o)