Whale oil lamp, blown font & standard, pressed base

This whale oil lamp is appx. 8 1/4" including the collar. It has a blown font and a blown standard. The font is attached with a 4 tier wafer and the standard with a double wafer. The pressed base is almost lacy. Unfortunately there is damage to the base. One side had a large piece that has broken and been glued in. At one corner there is a piece missing. Probably Sandwich, Ca 1830/40.