Hello All, I just purchased this Beauty. - Received today & was pleasantly surprised. An early 48, but possibly a 45 with added Stars. All sewn ( Huge )measuring 10' x 20' The size is stamped 20 followed by a Maltese Cross ? Maker marked Andrew Mills. 53 South St. NY. - I found they were in business from late 19th to early 20th century. I do not know what material this is I read that this maker used Flax & also made canvas Sails.- I believe this flag to be Military used - Sewn on the header is 6 Military snaphooks - I recognize these snaphooks as being used from the 1870's to around WWI on Sword hangers and such, but never seen them on a flag. Also thimbles have been added with hand hammered copper rivets that have stars on them & sewn ends. I also believe that 3 stars were added , the sewing is different on the 3 closest to the header and the material is brighter. There is also some writing on the header, But I cannot make it out. I just wanted to share & ask for others input - Military ? Navy ?