Red-
You actually have what's termed as a '704' monobloc crown with a 7030 tube.
Below are a 702(L) and 703®:
Essentially, both are of a wrapped style, where you have the core crown that is wrapped in an SS shell. You can see the crimping at the inner edge of the crown/serrations.
The 702 is an older style 'Triplock'- It is missing the exterior gasket on the tube, and is instead flanged at the end like so:
As such, the threading for the crown goes all the way to the opening.
The 703 has the exterior gasket on the tube and hence only has threading that goes to the halfway point on the interior of the crown. This is to clear the gasket.
Both crowns have long style coronets, whereas the 704 monobloc has the short, squat coronet like you have.
704:
Hope this helps...