Maker marked PGW for Peter G Wilson (1866-1916) and INS for Inverness, this badge dates to approximately 1880, the construction detail of the hinge being the give-away here. Earlier in the century, Luckenbooth badges (sweetheart brooches) were normally one-third of the size of this (just over 7.5 cm from top to bottom).

This is just over 2.25 inches long. The hilt is representative of a 17th-century ribbon hilt, beak-nosed broadsword. There was a great fashion for agate and silver-mounted jewellery in the 1860s and 70s - plaid brooches and miniature dirks were manufactured in the same way.