13th January 2008, 05:32 PM
Thats got folk stumped ... looks 20th century.. machine cut grooves... two uprigth psots over a circle that needs a smaller ... would it be anything to do with OS Survey Grid?
"No job worth doing was ever done on time or under budget.."
Khufu
"No job worth doing was ever done on time or under budget.."
Khufu