Amelung blown glass milk pan circa 1790-1826

Looking for someone to confirm my research and provide price estimate.  The piece has average dimensions of 9.5" in diameter and 2.5" in depth.  It is aqua green in color with a rolled lip.  There is prominent swirling on the base that extends onto the walls.  It is made of window glass, has a few carbon inclusions and is bubbled.  One of the two larger bubbles has blown through the outside wall but not through the inside.  The pontil scar feels as though it had molten glass dabbed onto it after the pontil was snapped off.   It is undamaged, i.e. no chips, cracks, breaks or repairs.  There are, however,  scratches and scuffs on the base rim.  Please contact me anytime with your insight.  Thanks!