http://www.ebay.co.uk/itm/AUTHENTIC-ANCIENT-DACIAN-IRON-SIKA-SWORD-RT-55-1-/330569826885?pt=LH_DefaultDomain_0&hash=item4cf77f4245
Now supposedly this is a Dacian Sica. There are no prizes for judging that it might be an agricultural implement too.
Roy
There is a book referred to in this thread http://soa.org.uk/sm/index.php?topic=5429.0.