Crack, yes or ?

[opmustard]

Starting taking photos of my garage sale insulators.
I noticed on some of them, what seemed like a crack/s?
Here is the worst one I came across. Please, let me know if its cracked or ?
Yeah, don't much about insulators.
opmustard

 

[CanadianBottles]

Looks like a manufacturing flaw to me

 

[J.R. Collector]

I seen Crack, yes or ? So I figured I would click on this to see who's got the crack for sale? Glad to see it was just a piece of glass and I dont mean meth!!! Lol

 

[opmustard]

I seen Crack, yes or ? So I figured I would click on this to see who's got the crack for sale? Glad to see it was just a piece of glass and I dont mean meth!!! Lol

That is funny, never thought about crack other than a crack in some form of glass.
Well, do you think it is crack (in the glass?)
opmustard

 

[J.R. Collector]

It does kinda look like it started as a flaw that now is cracking, and looks to be branching off in different directions. It is hard to tell from pictures.

 

[Robby Raccoon]

It looks like a manufacturing flaw from cooler glass moving in the mould-- hot enough to be somewhat liquid, but cold enough not to have formed perfectly.

 

[UncleBruce]

I guess it could be a flaw, but the glass just got a fold in it when it was manufactured. That happened a lot. I don't considered it damage. I think these grooves are called straw marks.

 

[Jimmy Langford]

Definitely not a crack. It's a factory defect.

 

[BillinMo]

Yes, fold in the glass, AKA straw mark as Bruce mentioned.

 

[opmustard]

Thank you everyone for the information about my insulator.
I don't collect these type of insulators and I just started collecting CD 121's.
Now I have idea about what to look for when buying insulators.
Personally, I thought they flaws looked kind of cool.
opmustard