Scarce Early 19th Century Whale Oil Lamp

Very early heavy aqua bottle glass whale oli lamp. These bell shaped pamps were made over a long period of time I assume judging by the number of lamps in this form found all over the Mid-Atlantic area. It is a well designed yet simple form fairly easy to make. The thing is for every clear or pressed glass lamp in this form found in clear glass  only a small amount turn up in aqua bottle glass. This is a shinny clean perfect example with its double wick burner.