YoKai,
It is the Finemolds kit No FS 3
I also have kit FS 2 - the sub used during the Pearl Harbour attack.
There is only a slight difference between them - the Pearl sub doesn't have the mine wire guards for example.
Interestingly, this kit DOESN'T give you appropriate numbers for the Sydney Hulls (I guide at the Australian War Memorial and our display is parts from two of the three subs), and while I have included the white markings on the coning tower here, they do not appear on our sub. The depth markings on the nose here are only one set - ours has them on both sides.
It is a little fiddly to make the prop guards etc but basically easy with patience. I made the wires fore and aft using black cotton glued at one end then stretched and glued in place at the other.
Hope you like it.