|
5th January 2015, 09:52 PM
|
#9 |
|
Member
Join Date: Mar 2012
Posts: 422
|
Microscopic examination of tool marks is good. But then you need to know what you're looking at. But since, as noted above, it looks like it was done using a Dremel or similar, I'd call it almost certainly modern. (IMO, "almost" is generous.)
|
|
|
|
|
Threaded Mode