Made long long time ago, I think in the last century. Got a lot of compliments so stayed not frogged (usually I do not keep my old sweaters that long). Have no idea how I made the hole that fits very well to the circular crocheted insert. Used recycled mixed cotton and linen yarns for a sweater and different cotton boucle yarns for a crocheted insert.
Just now I realized that there is something in common with another my design and project Snowflake. Only there is almost 15 years time gap between those two.