An unusual late 18th Century socket bayonet

An unusual late 18th Century socket bayonet, by Thomas Gill, hollow triangular-section blade 12.5 in., marked 'THO GILL' and with crown inspection marks, muzzle ring diameter approximately 21mm, socket length 3.2 in., stud to muzzle length 1.4 in., with no provision for either the Hanoverian or Lovell catch, socket with rack number 3 over 3, leather scabbard with brass locket and chape, the former with round frog stud on the ridge side rather than the flat, the latter with pointed terminal, possibly an artillery or a sergeant's India pattern example.

Ref. Skennerton & Richardson