Mum's button tin, Dad's army button

In my Mum's button tin I came across a brown button like this, which I recognised from my dad's army greatcoat. He and every other farmer in the district wore their army clothes in those years as they were soldier settlers and didn't have much else. That brown button became part of my personal favourite necklace.  This dark one was picked up recently from an op shop and I put it in the centre of this grey green necklace. I was pleased with the effect. What do you think?