Hello all. I have been researching this bayonet for a few hours and I can not find any slimmer bayonets. There is no date's on the bayonet or saber. The only hallmark that I can find is crown on the Quillon hilt side, there is also a crown and what looks like a small square on the bottom right of the crown on the Press Stud. Right above the Crossguard were the lock is, there is what appears to be some letters. It is really hard to see, and I can not get any clear pictures, but It looks like there is at least an S in the middle of the lock. Here are some of the pictures, if you need anymore just please let me know.