Which of these two edges is the upper left edge of the crater? What "standard" impact crater has two rims?

You see there is barely visible a raised rim around the perimeter of the feature but the double edges at the upper left are exaggerated in size compared to the rest of the rim.
I found something analogous to this in regards to volcanic vents in this online lecture:

Pyroclastic Landforms and Pyroclasts.
http://skilling.geology.pitt.edu/GEO3975/pyroclastics/pyroclastics2.pdf

As shown in the image on p. 8 of this lecture, a blown up edge could be due to wind driven ash from the vent:

"Diamond Head near Honolulu is a famously difficult phreatomagmatic landform to slot into ring vs cone. Most of edifice resembles a tuff ring, but wind has given rise to a steep cone-like side. Most of deposits are also typical of tuff cones rather than rings. Hence several factors control ring vs cone (hydrology, wind, efficiency of magma-waterexplosions etc)."
PyroclasticLandforms and Pyroclasts, p. 8.

But what's really key in this lecture is discussion of the fact that volcanic vents can have nested rims. See page 9 with an image of Hanauma Bay, a nested tuff ring complex on the coast of Oahu and page 14 with "Asymmetric nested tuff cones of Koko Crater on Oahu".

Some more examples of "nested" volcanic craters:

Santa Ana Volcano.
"The summit of Santa Ana features four nested calderas and volcanic craters, with the innermost containing a small crater lake."
http://en.wikipedia.org/wiki/Ilamatepec

Santa Ana Volcano, El Salvador.
"The volcano sports several crescent-like craters—“nested” craters—at its summit and a 20-kilometer-long system of fissures."
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17054

This might be an especially relevant analog since it has a larger volcanic crater nearby the nested crater that has a scalloped rim. This would be analogous to the Victoria scenario if Victoria is a volcanic collapse feature as I suggested.

Also:

Ibu, Halmahera, Indonesia.
"The nested sumit craters of Mt. Ibu. A brand new lava dome can be seen within the central crater, emitting a plume of volcanic gases."
http://volcano.und.edu/vwdocs/volc_images/southeast_asia/indonesia/ibu.html

Global Volcanism Program | Volcanoes of the World | Types and Processes Gallery | Craters.
Cotopaxi.
"The glacier-capped summit of Ecuador's Cotopaxi volcano is truncated by two nested craters. The outer crater, seen here from the SE, is 800 x 550 m wide. A cone that grew inside this crater is cut by a smaller crater that is 250 m wide and 120 m deep."
http://www.volcano.si.edu/world/tpgallery.cfm?category=Craters

Harrat Hutaymah, Saudi Arabia (Page 2 of 2).
"Looking northwest to the nested cinder and spatter cones of Harrat ad Dakhana in the north-central part of the Harrat Hutaymah volcanic field. Photo by Carl Thornber, U.S. Geological Survey."
http://volcano.und.edu/vwdocs/volc_images/europe_west_asia/saudi_arabia/harrat2.html

Bob Clark