Seiko 300m Tuna SAPPHIRE Preferred Over Mineral Glass?

300m Tuna hardcore collectors, Is SAPPHIRE preferred to Hardlex?

Thanks

Bry

https://i.ibb.co/k0NTx43/ddd.jpg

must admit I would like that(atough I no longer have my 300m Tuna)

Having had both within a week the hardlex looks much nicer imho

When I got mine I thought upgrading the crystal to sapphire was the first thing I'd do but ended up actually liking the hardlex.

I think the hardlex looks nicer than the sapphires I have had in mine (all aftermarket - don't think Seiko make a sapphire for this model), but the way the dome projects above the bezel means the hardlex seems to get scratched very easily. So on balance I prefer to fit a sapphire.

I had a blue AR sapphire fitted to my SBBN017 thinking it would be ace. After a couple of weeks I changed it back to hardlex.

It just didn't look right, and I think that applies to most older Seikos. The hardlex is warmer and more natural looking.

Personally much prefer the look and durability of sapphire.
https://i.imgur.com/88wQvDf.jpg

Never had issues with scratches on my tunas from normal use. Only a tiny part is raised over bezel. Isnt sapphire more prone to shattering with a knock?

Hardlex looks better IMO.

Sapphire has higher reflective tendencies and requires decent anti-reflective coatings to work well. External AR is a really terrible idea on a dive instrument and will get cut up over time...yes, looking at you Sinn. AR isn't essential on Hardlex/mineral.

The durability issue isn't as clear cut as forum dwellers like to suggest. Sapphire shatters more easily, Hardlex scratches more easily. There is a reason most dive gauges use mineral glass - a scratch doesn't cause your equipment to fail but a crystal shattering is a significant problem.

http://www.wellnet.com.au/pics/Seiko...-10-25%201.jpg

http://www.wellnet.com.au/pics/Seiko...'s%204.jpg

http://www.wellnet.com.au/pics/Seiko...20view%206.jpg

Hardlex :eagerness:

Leave it standard
https://i.ibb.co/DtXTb56/E98-BADD3-D...8-EB0291-B.png