Here is a 10 Öre uniface gold trial strike. The obverse shows King Oscar II. The obverse is identical with the dies that was used for the striking of 10 Öre for Oscar II during the years 1872-73. The weight of this die trial is 2.16 grams, which is much heavier than the weight of a regular silver 10 Öre at 0.85 grams.

Usually trial strikes are made in cheaper metals to test the dies. Why this striking was made is somewhat of an enigma. A similar coin does not exist in the extensive collection of trial strikes and patterns at the Royal Coin Cabinet in Stockholm or in any other collection. I purchased it 2005 at an auction in Stockholm.

Here is a regular silver 10 Öre
that was struck from 1872 to 1873: