Now I know why my neighbor Pauline has@legend is fully correct, tungsten is known to cause many skin irritations.
Tungsten carbide is on most cases bound together with nickel, which is what is known to cause for example blacking of the skin.
If nickel isn't used, it's usually cobalt which in itself is s whole different monster and causes eczema of the skin.
1. A new 15400OR which she refused to show me close up and
2. A blackened wrist.
I’m going to forward your post to her and say “I told you so”.