Well, I'm sorry to say this is also a reproduction. You see the mold lines on the top of the lip? That's the proof.. a real one would have a hand-shaped lip.. your flask is depicted at the bottom of this website page about repro bottles:
Let's see if this works:
http://images.google.com/imgres?imgurl=http://www.bottlebooks.com/Repros/Union%2520(Copy%25202).jpg&imgrefurl=http://www.bottlebooks.com/Repros/More%2520Repos/more_reproductions.htm&usg=__zIbzi6BKu3YmBnAj-_y8_gawORg=&h=867&w=452&sz=100&hl=en&start=7&um=1&tbnid=rK0UhOmGriL-jM:&tbnh=145&tbnw=76&prev=/images%3Fq%3Damber%2Bunion%2Bflask%26hl%3Den%26sa%3DN%26um%3D1
I don't have a mold seam around the neck holding the neck onto the bottle like this repo shows. My neck is all one smooth piece. I do have mold seams down the sides of the bottle and on the top of the lip. I trust your expertise and thank you for your help. It's just sad because this bottle has been in the family for years and was passed down to me by my uncle so I was certain it was real! Oh well, Thank you all for your help []