Please help me figure out the correct crystal for this Benrus wrist alarm. I'm pulling my hair out!

[Max50916]

Hello, I'm absolutely pulling my hair out finding a replacement crystal for this watch. Case says style # 6810.

 

The original crystal was fine but I made a big oopsie and took a huge chunk out of the edge of it, and so have been trying to replace it. After searching my inventory I found an original PA429-40 Crystal for the "Benrus 276-6810 Elegance"M" and "P" Wristalarm series for reflector ring" but when I went to put the old reflector ring into that new one the ring was too large and I cracked the rim (dang it). Since the package wasn't sealed I thought maybe it was a fluke and someone had put the wrong crystal in there. So I went online and bought a new sealed PA429-40 crystal and it too is too small to fit the ring.

Measuring the original vs the new one, the original is overall larger. I can't figure out what the actual correct crystal is though.

(Photo of crystal with a big chunk out of the edge is the inner diameter of the original, other crystal measurement shown is of "replacement".

Without the exact right crystal the case will not stay closed because it's pressure fit. I'm out of ideas and really could use some help on this.

[JohnR725]

21 hours ago, Max50916 said:

Without the exact right crystal the case will not stay closed because it's pressure fit

Okay so what you're basically saying is this isn't your normal crystal. In other words this is one of those strange crystals that also functions as an integrated part of the case to hold the whole thing together.

I don't suppose the crystal number is the same as the number on the case like here for instance

https://www.ebay.com/itm/125623627474

Another option is just to email the manufacture and ask. They should have better reference material and worse case they can do a custom crystal

https://www.gssupplies.com/crystal-catalogs/

 

 

Edited December 14, 2022 by JohnR725

[Max50916]

5 hours ago, JohnR725 said:

Okay so what you're basically saying is this isn't your normal crystal. In other words this is one of those strange crystals that also functions as an integrated part of the case to hold the whole thing together.

I don't suppose the crystal number is the same as the number on the case like here for instance

https://www.ebay.com/itm/125623627474

Another option is just to email the manufacture and ask. They should have better reference material and worse case they can do a custom crystal

https://www.gssupplies.com/crystal-catalogs/

 

 

Yes exactly. Ok this one already has the tension ring inside so perhaps it's the correct one! We shall see. Thank you!

[Max50916]

On 12/14/2022 at 5:19 AM, JohnR725 said:

Okay so what you're basically saying is this isn't your normal crystal. In other words this is one of those strange crystals that also functions as an integrated part of the case to hold the whole thing together.

I don't suppose the crystal number is the same as the number on the case like here for instance

https://www.ebay.com/itm/125623627474

Another option is just to email the manufacture and ask. They should have better reference material and worse case they can do a custom crystal

https://www.gssupplies.com/crystal-catalogs/

 

 

Update: Eureka!!! For whatever reason this one worked perfectly but two attempts with the GS would not. Thanks so much for finding this, don't know how I didn't see this version when I was searching on ebay before. 

[dadistic]

I've had that problem with GS PA crystals, too. They don't always fit as well as one might hope. Fortunately, since they are acrylic, the can sometimes be tweaked without too much trouble.