Date:
1992P
Sorry for the delayed reply to all. Work has been interfering with fun.:(
(Down a guy and having to fill in to try to keep on schedule.)
Viv, you're on the right track because there is some metal from the struck devices filling in the incuse area (from the pressure of the strike).
Jim, definitely not a strike through. May need to send to you for better images and clarification.
Jon, I'll try your suggestion a little later when more time is available.
George (Roller), First image below is for you.
Meanwhile, here are some more images taken at night. (darkness at night seems to help somewhat, less ambient light messing with the phone I think)
And of course, Thanks for all comments. Cliff