Plexiglass from 30's, 40's,50's, ... let's see the different types

Hello to all,

I don't know if I am the only one that hates some of the old plexiglass. I have some watches that the Plexiglas has very nice shape, very close to the bezel and some others that are like building a wall on top of the bezel.
don't know if there is already a thread that shows pics of all types of them but it would be good to know the Plexiglas types as per the age or watch brand. I guess many of the vintage watches that we have have replacement plexiglass not the original ones, that's why some of them they look so ugly . What are your toughs? now is late night and no time to make some pics but tomorrow I will make some examples and I would love to hear from you what are the Plexiglas that you love and hate the most and if you think that are the original ones or replacements. I know that this topic is very bast as are many watch manufactures and watch designs, but I'm sure that many of us will indicate the typical that hate the most.
thanks to all :O)

This an example of what I hate and I guess it’s a replacement. I’m showing the face of the watch so you can get an idea about the aprox year of the watch

Definitely you explained what I mean! I need a low profile plexiglass as this one is terrible and sure is not the original . I was aware about omega and UG marking the plexi with its logo, do you know if Movado was doing the same ?
Thanks

No.

Thanks

I noticed that my SONA dial has a distinct domed appearance. The domed crystal is fitted fairly low with little of a wall around it. I think this could not be fitted lower without interfering with the hands. The height of the hands would prevent some crystals from being fitted more closely than they are.