Good morning! Unfortunately, it was broken, but I found what I believe to be a late 1800's to early 1900's bottle here on Guam. It was located in an old WW2 era burn pit, which may explain why it was broken. It was intermixed with WW2 era coke and beer bottles. I suspect this was a pre-war dump site that continued to be used after the war. unfortunately it's the only pre-war fragment I could positively identify. According to the Glass Manufacturer Marks index, the "T in a circle" logo is unknown, seen on the base of an aqua rectangular paneled prescription bottle, c. 1910-1930. This bottle is green, but rectangular. I am not familiar at all with bottles from this period, but it seems large for a prescription bottle; each side is exactly 3 inches across at the base but it widens up the body. I don't know how tall it is since it's a fragment. Any ideas? Thanks!-Dave