BrazosDog02 said:

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Found this in an old barn west of San Antonio. Original property is going to date from the 1840 to 50's but I don't have my reference to be certain. I know what it is but not exactly what kind. It's all iron as far as I can see and not broken. Not sure is it's complete or not. Thoughts ??

https://photos.app.goo.gl/6YP1oVRHmezKhCbU8

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It looks like it maybe could be a Model 1855 socket bayonet or the model 1873 trapdoor as mentioned earlier. I don't know how to tell the difference but it looks like the locking ring is missing. The blade has a very triangular and the flutes are deep. It's long and it comes to a relatively thin point. It looks like it would create a rather nasty wound.

A few of the pieces:

SA M1C - 2,438,XXX







Winchester M1D - 3,683,XXX





Inland M1A1 - 5,230,XXX





SA M1 - 6,083,XXX







RR and Colt 1911A1









Erfurt 1917 - 3,333