Hi Nitrolures, jumping in.
Start by going
here, scrolling down a little bit to the area where it says "Download and Print the Image Below." Do so. Then bookmark the site and include a link to it when you want to be one of the cool kids

.
This diagram with its assorted designations gives us a common language to talk about this lovely and fascinating variety of stamp.
I start by looking at ornament "R", the backwards "C" shaped doohicky that lower right corner of the lower label is pointing to. If this is cut in half, and there's plenty of margin on the right, I'm almost certainly looking at a type V.
Then start looking around. Wide margins left and right? Check. Top ornaments cut off? Check. Broken outside borders of the labels top and bottom? Check. Left side ornaments cut off? Check. Bottom oranaments, especially the scrolls and plumes cut off or missing? check.
The type V was all about making room for perfing, so everything is cut off on all sides. That said, there are a few circumstances where the right side ornaments are
not clipped, or not clipped completely. This is the type Va. It doesn't get a separate Scott number, but it does get separate mention and a significantly higher price in the
Specialized (I think it should be #24c, myself). There have been a few Vas on schmeebay lately, and you know people are looking out for them when suddenly a #24 is selling for $60 or more. I'm biding my time and being patient. Hrrm. Trying to be patient.