These are two sizes, similar models forged sickles by the Falci company of Italy.
The larger one, model no. 751 1.5 is a well-finished old production but will benefit from peening, just like scythe blades. The smaller one, model no. 795 2/0 are nicely finished, well-tensioned, old production sickles and the edges can be initially finished just with a stone.