help with vintage spectacles

hi guys

can anyone tell if these glasses are a plastic or real TS

i dont really want to ruin them by burning a hole in them

theres no metal wire in the arms, which ive read is a sign they might be TS

no bothered either way, as i can sell them if they are not

hopefully someone can tell by the pics

1930s ?

any thought appreciated

 

The thin crazing in pic2 is a clue for man made material.
You can too put your tongue on that place (after cleaning) and feel if it taste chemical, something like a manicured nail

 

Thanks kyra, great tip, saves me ruining them

 

If you could check the center thickness of the lenses it might help with a time frame.

 

Definite bitter chemical taste

At least I can ebay the buggars now

Brilliant help kyra

 

Never knew that holly, I'll probably leave the lenses in, in case frame breaks removing them

All I can tell you is the lenses are very very thin

 

The frame would need to be heated to safely remove the lenses.Thin is relative,I think the minimum thickness after the mid 60's in the U.S. was 2.2 mm and before that there was no requirements.

 

My fav test/taste!
They are around 1920, I’d leave the lens on, if the buyer wants to change them, he’ll have to go to an optician anyway...

 

I usually go with the duct tape and hammer method, which I always use on thicker plastic frames and works well, as the tape keeps the glass moving after being hit

 

i got these frames with em as well, arthur askey ?