A silver, gem-set and enamel Grenadier Guards jewellery box, early 20th century, of rectangular

A silver, gem-set and enamel Grenadier Guards jewellery box, early 20th century, of rectangular outline, the lid applied with red guilloché enamel, centring on the regimental badge of the Grenadier Guards, set with single- and rose-cut diamonds, step-cut emeralds and rubies, accented with blue enamel, opening to reveal a compartmentalised velvet interior, measuring 8.8 x 11.3 x 5.0cm, partial British import hallmark