Antique 18th century Imperial Russian Glass Vodka Decanter Shtof Штоф

Rare antique, 18th-century Imperial Russian glass vodka decanter Shtof (Штоф- Штофик), made by Jamburg Glass Factories (Ямбургский стеклянный заво) or Imperial Glass Factory in St Petersburg (Императорский стеклянный завод).
 
A hand-blown glass vodka shtof decanter of rectangular shape with a sloping shoulder, a short neck with a flaring lip, and a body engraved on one side with an Imperial double-headed eagle under the imperial crown within a radiating circle. The base has a polished pontil.
 
Over the centuries, the shape of the Russian two-headed eagle has undergone many changes. This eagle pattern is characteristic of the 18th-century form.
Due to their fragile glass, these decanters are very rare. Most have broken over 200 years, and few survive today.
 
Dimensions:
Height: 20.5 cm (8.07 inches).
Width: 8 cm (3.15 inches).
Depth: 6 cm (2.36 inches).
 
CONDITION: It is in very good condition, with no cracks, chips, or repairs. Showing age and use, with minor wear considering its age of more than 200 years, absence of stopper
 
REFERENCES:
1. "Russian Odyssey" The State Russian Museum. Page 82.
 
2. "Русская керамика и стекло 18-19 век. Собрание Государственного Исторического музея" by Дулькина Т., Ашарина Н. ("Russian ceramics and glass 18-19 century. Collection of the State Historical Museum" by Dulkina T., Asharina N. Page 71. No 50).
 
For related 18th-century Russian glass shtof, please see the links below:
http://www.awdl.ru/russoe-steklo-i-hrustal/shtof-v-venzelem-elizaveti-1363
https://ustyug-museum.ru/pocelain/category/6.html
https://www.litfund.ru/auction/396/2/
https://www.litfund.ru/auction/220/192/
https://permartmuseum.com/exhibit/27102?
https://permartmuseum.com/exhibit/27803