If you could post an image, that would be most helpful...and advise the dimensions. You can easily upload them to www.imgur.com and then send the link to them back here, if the photo attachment tool is not working for you.
With kind regards,
My apology for the delay, but the site is locking up today and timing out--you have a very fine example of a pre-WWII era hunting knife made by Union Cutlery of Olean, NY, prior to 1923. The company evolved into the brand name KA-BAR, which was the finest fighting knife produced in the United States in WWII. As combat knives were in short supply early in WWII, hunting knives such as yours were often provided to soldiers by their friends and family. You can likely find Sgt. O'Conner using the online research base, https://www.fold3.com/, if you wish to learn more about him. Likewise, you can likely find Claude by doing a census search on Ancestry.com and that may tell you a bit more about them. Your knife has the original leather sheath, which is important, and in most markets the retail value, pending the service record of the Sergeant, would be around $125-175 to a collector. The pattern is scarce and with the identification, it would be in strong collector demand today.
If I can help further in any way, PLEASE just ask!