My much beloved 015 Tuna is due for a battery change very soon. Caseback shows first quarter of 2014 but for now its still ticking strongly, so unless I get the 2 second EOL indicator I'll just let it be...

I really like the curved A/R coated sapphire crystal that disappears on my sinn 203...so much so that I was thinking whether I should go for an A/R Sapphire mod while the watch is open for a battery change...

Don't get me wrong there is nothing wrong with the watch as is, the reflections off the twin curved hardlex give the watch a certain 'vintage' look to my eyes but I'm not sure if the A/R Sapphire would be nicer. Any of you did that mod here to there hardlex Tuna...if so how did you like it? Thanks for any advice.