When I was a kid (early/mid 80's) we used to go up to Milfield every year to run a caravan rally for the northumberland center of the caravan club. My dad was a huge nut on all things connected to aviation, which was eagerly transferred to myslef, and he always jumped at the chance to attend the Milfield Rally.
To this end I have a large stack (20/40) of good quality photos of Milfield and the majority of the buildings and hard standing areas bfore they were demolished. Included in these are a few photos of the Eagle orbs complete with inscription.
If you are interrested I would be more than happy to dig some of these out and post on here or produce some coppies and send them to you. They were taken with a good quality camera ( Pentax slr with a veriety of lenses) and are fond memories of time spent with my dad before he passed on.
My memories of the area are still relitivly good so I am able to discribe the general layout of the time.