This is a tough question since you don't know what the core is made of. Most likely Zink but could also be (unlikely) brass or copper. Since the majority of the weight comes from the core, you would be guessing. The weight difference of silver to Neusilber is about 60%, i.e. a Neusilver frame weights 40% less than a silver frame.
But 28.4 gr. is surely on the high side for a non-magnetic cross so it could very well be silver. Since you know how to test it, test it!
Dietrich
You would have me take a dental pick....etch a notch in a perfectly near mint Cross, pour acid and await the color change....
Is the boy crazy?
No, I'll be happy with what it is. Neusilber and zink, silver and zink et al!
I'm just asking because it would be interesting to learn whether this is a Neusilber frame or an unmarked silver frame. And if it's Neusilber, it surely must be early. It's unworn, so maybe a shop example. Actually, most likely!
I know it is tough to ask since I had the same feeling when asked by otheres to proof that my cross has a silver frame...and nobody suggested that anybody would be crazy.
Now without testing the frame and without scratching the coating nobody will know.
Take a look at this one, no way did it get this rough on a display. You can smell the sweat on the ribbon. The cross has the molecules of battle engrained into it!
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