Thanks for posting. This is the real deal for certain - a 19th century Masonic historical flask. Value, as is always the case with antique bottles, depends so much on the condition. With this flask, high point wear on the two sides (from lying flat, rubbing and causing scratches) is common and detracts from value. Even tiny flakes chips or cracks take away from value. Bottle collectors frequently have their magnifier glasses on looking for blemishes which are not uncommon. If truly in great condition, then this is a $400-500 bottle.