AR treatment on a fiddy

[CPTony]

Hi guys
I have just bought a fiddy from a RWG member and i have realized the crystal has a blueish AR which i am not sure is correct.
I have read some posts and my understanding is that the AR should be colorless, am i correct? If so, is it possible to remove this one and apply a colorless one?

 

[Strodda]

Mine had the same blueish AR, so I bought a WSO crystal. Turned out quite well. Its not cheap, $150, but I have no idea what an AR job costs, and there's no waiting for a new crystal.

 

[CPTony]

nice! is "WSO crystal" this one?

http://www.ebay.com/itm/PAM-127-SAPPHIRE-CRYSTAL-FOR-PANERAI-WATCH-1950-47-FIDDY-/160658371241