gchristofi

Here's a photo taken from A with a low angle light source to try and show the striations more clearly.....

gchristofi

photo from B.....

gchristofi

From C...........

gchristofi

And finally from D.....

not a great photo but there doesn't appear to be any signs of corrosion at D. Perhaps it is on the other broken end though which I don't think I'll ever get to see?

(sorry to all those with no interest in metallurgy )