The studs seem rounded from what i see. Any help on identifying?
Not the rivets on the case. The studs on underside of the razor's cap that hold the blade in place. The earlier ones were rounded like the razors in the American ABC sets, and later ones seemed to shift over to the bullet-shaped studs just like the American Pocket Editions did.
Also found a small crack on top of the ball end, read about those somewhere too but can't find it anymore, that might help too...
Yes, that's the scratch that I've talked about before. It seems to have been a pretty consistent manufacturing defect in these models. Here's one thread where I mentioned it, and if you look at the razor that started the thread, you can see that it's an example of the later model design that I mentioned above with the bullet-shaped studs and the "punched-up" guard plate. And then lower down in that thread is an example of what would seem to be a transitional model that has the bullet-shaped studs, but still has the punched-down guard plate and "PC" prefixed serial number.