Product Description.
The chain is stamped with a lion, so this product was made in England and is made of sterling silver (925/1000).
It has been authenticated by the Birmingham Assay Office at the time from the maker's mark.

Maker's Mark
JS★"
This is a common mark on watch chains & T-bars from 1884-1898, as it belongs to Joseph Sewill, who founded the company in the early 19th century.
Joseph Sewill was a watchmaker who supplied chronometers to the Royal Navy on South Castle Street in Liverpool.

Standard Marks
Lion Passant."
This engraving indicates purity. Since the mark is a lion facing left, it is sterling silver (92.5%).
Each piece of the gradation chain, which becomes thicker toward the center, and each T-bar are stamped with the Lion Passant mark, which indicates sterling silver.

Date Letter
It is hard to discern, but it looks like "q" = 1890 for the then Birmingham Assay Office. I think it is 1890 because it also covers the date of the maker's mark.

Coin Fob
1849 four pence silver coin.
Front: Young Queen Victoria in profile facing left.
Reverse: Goddess Britannia, personification of the United Kingdom, seated facing right

○ Actual size
Total length: 31.5cm (from the base of the T-bar to the tip of the clasp)
Fob chain: 7cm (from the base of the T-bar to the tip of the coin)
Fob coin: 1.6 cm in diameter
T-bar: 3.4 cm

Material
Sterling silver

Weight
Approx. 40g

◯　1inch=2.54cm(25.4mm)

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