How about some standard Nd:YVO4 crystal series?

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Fuzhou Antyco Optics Co., Ltd.
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E-mail: [email protected]
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Juyuanzhou Industrial Zone, Fuzhou, Fujian, China
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the center pin has popped out of the back from a sudden knock. You can remove the crystal and gently press them back into the center post. Check the second hand before closing it back up.

Watch crystals are pressure fitted to their cases so that they are resistant to popping out. Think of a champagne cork, and how it expands when it comes out of its bottle.
Crystals are set into cases in one of several basic methods. First, a crystal may be installed from the back--watch cases are commonly assembled before the movement is installed. So, one potential way of reinstalling your crystal is to remove the watch movement from the case (if it isn't already) and try pushing the crystal from the back forwards. If this is indeed the way it was installed, the crystal should pop into position with a noticeable click or light thump to let you know that the other edge of the crystal has found the shallow groove in which it's supposed to sit.
Second, some crystals can be installed from the front using a tool called a "crystal lift." This tool has many little fingers that compress the edge of the watch crystal so that it can be slid into the case. Pressure is then gradually removed from the crystal, permitting it to expand into the shallow groove into which it's supposed to sit. Crystal lifts are easy to use in theory but somewhat finicky in real life; the crystal must be grabbed equally by all the lift prongs or else the crystal will have a tendency to squirt out of the tool before it's been completely set.
Looking at pictures of your wife's watch, it doesn't look to me like a crystal lift would do any good. I think instead that your crystal might have been installed using a third method. Looking at the pictures, it looks like the bezel--the metal top of the watch--separates from the watch body. If this is the case, gently pop off the bezel and push the crystal into it from behind. Then, push the bezel back onto the watch movement. It's possible that the crystal is kept in place by being squeezed between the bezel and the rest of the watch case.
If all of this sounds daunting, putting the crystal back in--assuming it's not cracked--is a minor job for a watch repair technician. It literally might only take 5-10 minutes to complete the job. If you're concerned about the appearance of the watch, it might be safest to pay someone the small amount of money to get this done right. Replacing a watch crystal with a new one usually runs about $15-25, around where I live. Replacing an undamaged crystal that's popped out should cost appreciably less, since a new crystal costs a jeweler between $5-25 for most standard sizes (diver's watches and strange specialty shapes will cost more).

I have had to replace more glasses in this watch than any other brand over the last two years - It is most definitely a design flaw. The truth is though that you will not need a genuine skagen part. Your local watch repair shop will be able to use a standard 1mm thick domed Mineral Glass manufactured by Sternkreuz for example. It should be fitted by a qualified watch repairer, but you should not need to send it to Skagen. Good luck

Thanks for contacting FIxYa.

Use a jeweler's loupe to identify all scratches on the watch crystal. You do not have to remove the watch crystal from the watch.

Use a polishing cloth to remove dirt, grit, lint or any debris on the watch crystal. Squeeze a small amount of standard toothpaste with abrasive properties onto the watch crystal. Gently brush the toothpaste into the crystal for five minutes. Wipe clean the watch crystal. and repeat another five minutes.

Use the jeweler's loupe to inspect your progress. Repeat application if necessary. Apply Brasso polish once the watch crystal is wiped clean. This will polish the crystal to a clear, bright shine.

Apply Autosol or Polywatch to the watch crystal in the same manner as toothpaste if you prefer to use a product specifically designed for watch crystals. These products will provide the same results as toothpaste. You may also apply Cerium Oxide, a glass scratch remover used specifically in the window manufacturing industry.

Apply a small amount of 3-micron diamond paste using your finger or a Kleenex if removing scratches from a sapphire crystal. Rub the paste in for about five minutes. Remove paste with cloth. Buff the sapphire crystal with one-quarter micron buffing diamond paste for finishing.

Use a toothpick to remove excess polish and gunk that may accumulate between the crystal and the bezel that secures the crystal in place. Gently work the toothpick around the diameter of the bezel. Wipe the bezel clean with a cloth.

Buff the watch crystal with a polishing cloth.

OR..take to a local jeweler/watchmaker.
Best regards. Jewel

you cannot do this yourself ..try the manufacture or a competent repairer some crystals have to be made by hand if theres not one available through the trade repairers..

try parsec enterprises..they carry the old parts, dials and things to replace what you need

I suggest finding a watch specialty store.  Many jewelers can also change the crystal for you if they have a watch specialist on site.  If the crystal is round most stores can do it on site.  If it is not round, it usually has to be shaped and must be sent out.  Retailers such as Precision Time can change a round crystal, on site, for less than $40.  Go to precisiontimeco.com for locations.  If it is not round, they can also send it to their service center for a new crystal.