A side glass curiousity question

[Ghoste]

On 1st and 2nd gens, what is the purpose for the little notch at the forward upper edge of the side glass?

[A383Wing]

my guess would be for the rubber seal it goes into....and 66 & 67 are completely different

[Ghoste]

They may be different but they are still there so there must have been some purpose.  As far as fitting into the rubber seal, if you eliminate the seal then you no longer need the notch and it would just slide up into the top like any other square cut glass, no?  I guess what I'm saying is, it seems to me like the seal was created to cover the little hole which would otherwise exist when the window was closed as opposed to having the seal first and then cutting the glass to fit.

[A383Wing]

If seal was gone, and glass went to the top (square fit), then water could possibly come in from the top and while driving down the road....my guess

[Ghoste]

Why doesn't it come in at any other point along the top then?

[b5blue]

I think it sets the up crank of the window, fixing the position and holding in place to keep it from breaking when you close the door. 

[A383Wing]

Why doesn't it come in at any other point along the top then?

I assume this is just a test and you already know the answer? 

[Ghoste]

b5blue, that answer makes a little more sense to me, that may just be the one. 

[b5blue]

And that's a part nobody re pops right?

[Ghoste]

I don't know if they do or not to be honest.  I've never really looked for one or needed it yet.  I did know about the difference in the 66 and 67 glass but that was from changing vent window frames on my car for a better set a number of years ago.  The only reason I asked was because I was cleaning my car that day and as I was looking at the little notch I just started to wonder what it was for. 

[TylerCharger69]

Does this help out?