Recently acquired this bayonet and on the pommel it is stamped 1 WTS. I could be wrong but I think it was the abbreviation for the 1st battalion Wiltshire regiment? Would this have been unit marked during the Great War or would it have been out on there post war? Also does the month and year stamp look like 3 16 or 3 18? Feel free to share any info you know I would really appreciate it.