Advice on crystal replacement size

[Yandex]

Hello, 

I am wondering if anyone could help me decide what size crystal to buy for my watch. I have a Casio whose crystal measures 30.75mm and 1.62mm in thickness. I was wondering if a 30.8mm will fit? I have found a cheap 30.8mm, 1.5mm thick on eBay and wanted to use it. When the original one is inserted I can push it when pressing relatively hard with both my thumbs (I heard that is a good test in one of your videos). 

So will 30.8mm one fit? I am not worried it will be a bit thinner.

Thanks.

[rogart63]

30,8 will probably be perfect but 1,5? . Could work? Check cousinsuk for crystals? https://www.cousinsuk.com/product/180-to-200mm-sternkreuz-mfh

I would go up a size to 1,8? Casio probably has it's own size? But a generic would do fine? 

[Yandex]

23 minutes ago, rogart63 said:

30,8 will probably be perfect but 1,5? . Could work? Check cousinsuk for crystals? https://www.cousinsuk.com/product/180-to-200mm-sternkreuz-mfh

I would go up a size to 1,8? Casio probably has it's own size? But a generic would do fine? 

 

Thanks for the quick reply. The watch is very old and unpopular so I can't find generic. I don't want the glass to be protruding so I thought 1.5 will be good. Also, I never looked in these specialised sites because I thought they will be very expensive. Are there any other sites which might offer 1.6 thickness or 1.7? I think 1.8 will stick a lot. Thanks.

[Yandex]

32 minutes ago, rogart63 said:

30,8 will probably be perfect but 1,5? . Could work? Check cousinsuk for crystals? https://www.cousinsuk.com/product/180-to-200mm-sternkreuz-mfh

I would go up a size to 1,8? Casio probably has it's own size? But a generic would do fine? 

 

EDIT: Just measured with my caliper and the difference between 1.62 and 1.8 isn't that big, but neither is it between 1.62 and 1.5.

In your opinion which one is worse - to stick a bit above or be lower that the original?

[rogart63]

7 minutes ago, Yandex said:

EDIT: Just measured with my caliper and the difference between 1.62 and 1.8 isn't that big, but neither is it between 1.62 and 1.5.

In your opinion which one is worse - to stick a bit above or be lower that the original?

Depends on how the case looks? I looked at a 2,0 mm  sternkreuz crystal and that was 1,91 mm thick .Measured it right now with a digital caliper.  So they are seldom very exact . A 1,8 could be 1,62 mm? 

Edited March 12, 2017 by rogart63

[Yandex]

20 hours ago, rogart63 said:

Depends on how the case looks? I looked at a 2,0 mm  sternkreuz crystal and that was 1,91 mm thick .Measured it right now with a digital caliper.  So they are seldom very exact . A 1,8 could be 1,62 mm? 

 

 Just checked that site again. In the 1.80 to 2.00mm category, it has 30.8, but I can't select the thickness. I can just put it in the basket and nowhere to choose the size. Am I doing something wrong?