Found this heavy, spiked metal disc in the back of a junk drawer. Sharp as needles. No idea what it’s used for?

to moisture can lead to corrosion over time.

The age of a kenzan can often be determined by examining its style, markings, and patina. Older kenzans may feature distinct craftsmanship, with hand-made spikes and bases that exhibit signs of wear consistent with age. The presence of a patina, a surface coating that develops over time, can also indicate age.

Some kenzans may have maker’s marks or stamps that provide clues to their origin and era. Collectors value these details,