Ok, you are right, maybe I didn't exaplain very well.
Since it is a little bit complicated to explain everythng in english, I try to let the pictures talk for me.
Yes, I think these rings were cast, with a negative mold. But lost wax was not the only casting method existing.
Casting signs are present in all the rings. For example the sharp edges of the die struck pieces are not present in these rings. See picture below, where you can see a comparison between a rune in a TK ring and a edge of a "S" in a SS long service medal.
