Trying to identify the item in the attached photos. Hours of internet sleuthing and I'm coming up empty.

Fairly certain it's 90% silver based on specific gravity test results of 10.29
Fully Non magnetic including the pin.
Edge is smooth.
Pin appears to have been added after the fact. It is affixed to the face of the reverse not the rim.
total weight 36 grams
diameter 40.6 mm
thickness 3 mm
Similar in size, weight and subject matter to the 1901 5 Mark:
Anybody have any info? Coin? Medal?
Cannot find it in the Numista Catalog.
Obverse
FRIEDRICH I 1696-1896 WILHELM II
Reverse
INTERNATIONALE 1896 KUNSTAUSSTELLUNG
BERLIN
