Ah interesting. I tried uploading higher res photos but I exceeded the limit. I'll try with these. Also, can I clean it up with polisher or will that ruin the historical value?

IMG_7880 (3).JPG (146.99 KB, 239 downloads)
IMG_7881 (3).JPG (147.02 KB, 239 downloads)
IMG_7882 (3).JPG (111.5 KB, 238 downloads)
IMG_7884 (3).JPG (104.83 KB, 237 downloads)