Are there official gold plated versions or are they someone's self made?
For example 1916 on ebay
https://www.ebay.com/itm/256911385973?_skw=finland+1915+25+penni%C3%A4+gold
and one 1915 i found elsewhere:


Should they be added to the same page as “variants” or created entirely separate copy of this page as “different coin”?
