I personally know very little about the original prop or its origins, so I can't help you as far as determining what this is. I do however know a lot about metal forging and sword collecting, so I can help you determine what it's made of and if it's hand forged.
There are a couple steps you can take to determine the material. I usually start by seeing if it's magnetic, a lot of cheap knock offs sometimes use cheaper grades of stainless that aren't magnetic. I have never found a carbon steel that isn't magnetic, it may exist but I've never heard of it. If it is magnetic I then try to find an inconspicuous place on the sword, preferably under the hilt, and use a small cotton swab and water to wet a small section and then wait for it to rust over a couple days, you may need to reapply a handful of times. You can also use certain acid solutions if you are pressed for time. Some people hate this method because it rusts the sword, but if youre careful you can use a household rust remover to clean it. This two step process has been about 90% effective for me, keep in mind nothing is perfect. You can also have the sword sent off and professionally material tested, just be prepared to spend some money. Thats pretty much all you can do as far as testing what it's made out of.
As far as figuring out if it's hand forged, you can usually tell by looking up the blade at a 45 degree angle, in a well lit room, and looking for hammer marks. I'll post a picture of hammer marks on one of my swords in a second.
Hope this helps!