Newb Question... Case inspection

[Parashooter]

The "line" being referred to is a source of confusion to many. In fact, it can be very obvious or quite subtle, depending on case condition and degree of stretch. It can also occur at divergent locations forward of the solid web, depending on a host of factors. Here are a few examples, plus a GI tool for dealing with one that's come apart -



On the inside, incipient separations look like the Boxer-primed cases at right in this photo -



Novices are often misled by the completely normal "line" appearing at the web/wall transition - a geometric illusion produced by reflective effect as seen in the 3 lower examples here -