find from a while back

Bayonet This is a past find that I have never shared with many. I found it back in like 1973 in England on the shore of the English channel between England and Europe. I don't know what country it is from for sure but I always thought America. so I added the picture of the end its the only design on the whole thing no writing at all. For many years I used it as a digger for detecting but I finally decided to put it away many years ago as it is good history and a prized find for me Thanks for looking