Sheffield - Serving dish - Silverplated, Glass

Antique old Sheffield Silver plated (OSP) , sterling silver fused over a thick ingot of copper (bleeding). No visible hallmarks.
Silver-plated clam shell shaped lidded caviar, jam or butter server/dish.
Regency style with claw feet and ornate shell handle with cobalt blue thick glass liner, fluted body, scallop shell ridge, acanthus leaf decorations down the legs and claw feet. 19th-20 th century.

Measured from top rim to feet:

Length: 26 cm
Height: 7 cm from feet up to rim of vessel
11 cm counting lifted shell handle on lid.
10.cm width measured across wider middle section.
Blue cobalt glass : 6 mm thick

Weight: 494.5 gr.
Approx depth without glass liner: 5 cm
Depth glass liner: 4 cm