little off topic? glass question

[ojm bc]

I have a small cranberry coloured glass cup.

It has 1924 on it, if I look on inside and outside the 1924 is clear glass, I thought maybe glass is
dyed a ruby colour. Been tricked at flea market before with dishonest sellers and naive buyer, but this one I can't remove any surface or even scratch it? Found at garage sale for a dollar.

But even with a sharp knife/screwdriver the red colour is intact? Is this still a dyed glass?
weird or what?

Thanks for any info. oj/bc

 

[charlie dert]

I have a few pieces of ruby glassware from that era that are not dyed. One is a bowl from France. Are there any markings on the bottom?

 

[JimCVA]

you have the real ruby and clear glass not the flash type were they apply the red on the clear glass JimCVA

 

[ronaldj2]

Is the date and writing actually clear as in transparent? or does it have an opaque frosted look to it ? Acid etching can cause that effect.

 

[MINNESOTA DIGGER]

it is etched in it with a dremmel like tool