That one is an Italian M1938 bayonet. There is a folding version of this bayonet.
There are three versions of this bayonet. The folding model then there was a modified folder made into a fixed blade and then a model that was made as a fixed blade. It looks like yours is the modified folder.
Oh wow, thankyou heaps! Do you know if this has any value?
Does it have a scabbard ? This will add to the value. This is a
'non-folding' type, which are still desireable. It will indeed
be worth something, however the condition is
not that great.........
Sadly it doesn't have a scabbard, and yeah the condition isn't great. But the fact that it was found in a shed in Australia, does it suggest that it may have been from the battle of Tobruk?
I'm not sure what they are selling for now, But since you now know what it is , you could use your Google Fu and see what they are selling for. The price would also depended if you have the scabbard for it.
And do you know what gun it was usually attached to?
The Italian 1938 Mannlicher Carcano rifle. Hence the M1938 bayonet}8)
Wiki is your friend!!
Thanks heaps AZPhil!