A Monumental Silver-gilt Tankard, Russia?, 19th Century

Description
A monumental silver-gilt tankard, Russia?, 19th century.
A monumental Russian? silver-gilt tankard, marked with four English hallmarks at the base, which are difficult to identify and not relevant for determining its origin. These marks were either added later or an English silver piece with 17th-century hallmarks was used to repair the base.

Silver with 4 Hallmarks:
The Maker’s Mark: Not identified
The Lion Passant: The Mark that indicates Sterling Silver
Leopard’s Head Crowned: City of London
The Date Letter: 1670-71

The bold modeling and high-relief chiseling on the outer sleeve of the tankard are characteristic of goldsmiths trained in Flemish and German centers, but rarely executed by English craftsmen. A similar piece was sold at Sotheby's auction house in Paris on December 1, 2011, for €72,750; lot number 138. It was described as: Large silver-gilt tankard by Nicholls & Plinke, St. Petersburg, 1866. Height: 40 cm, weight: 3,046 grams.
The strong resemblance between the two objects is unmistakable, particularly in the handle, shape, and chiseling. The body of the tankard is decorated with a battle scene between Ottomans and Austrians, likely depicting the Siege of Vienna in 1683.

Two marks are present on the sides of the tankard:
The first features the inscription "Follow me"
The second displays the "Heraldic symbol of a British earl's coronet" and likely the "White Lion of Mortimer". Unlike the rampant lion of England, this creature lacks a crown. The White Lion symbolizes discipline and loyalty and is depicted in a less aggressive stance. The shield showcases a white rose encircled by a golden sun, heraldically known as a “white rose en soleil.” This is a combination of two distinct symbols that appeared on the great seals of Edward IV and Richard III and were used by George VI when he was Duke of York. The White Lion of Mortimer was the favored symbol of King George I, father of Queen Elizabeth II, before his coronation.
 
Dimensions
HxLxD 14,76in x 10,63in x 8,07in

Weight
89,31oz

Provenience
Private collection

Condition
Slight signs of age and superficial scratches. The four hallmarks are present on the lid and on the bottom of the base. Hallmarks not relevant.