To all intents a standard Martini Henry P1887 Mk III sword bayonet hilt, with a bolo blade instead of the regulation unfullered sword blade.
Weighing in at 1˝ pounds with a blade length just shy of 10˝ inches , the bayonet is only slightly lighter than the regulation pattern.
The regulation Mk III illustrated below is shown for comparison. Manufactured by Wilkinson, and issue dated 1889, the hilt is identical in every aspect to the bolo blade weapon. It is totally devoid of markings.
A private purchase or possible sample for a proposed pattern, it is tempting to speculate that it may have been fabricated as a late attempt to emulate the bush cutting properties of the Elcho bayonet. In any event, too late in the day, as magazine rifles and bayonets were already overtaking old Victorian concepts.