I am unsure of the accuracy of my Vernier caliper but I am measuring 34mm diameter, 3.5mm thickness. This crystal is from a Pam719 which should be the same as a 979. However, please don't quote me on this. The whole crystal cost and AR coating gets pricy so I dont want someone to rely on this info. if it may be erroneous.
Please note the same crystal also fit my Pam508. However, I am noting that previously a member raised the same question at the link below and Prof told him the dimension was 33.5mm instead. I am not sure if this means a thicker gasket? Best to double check with Prof.
Here is the link:
Looking to get a prof xtal on my PAM 508 https://www.intime01.co/panerai/2850-pam508-p-v6f-1-1-best-real-ceramic-on-nylon-strap-p9000.html Prof asked me to measure it to see if he has one to send. I'm a little nervous I'll screw that up with my ruler. Anyone know? ThankS!
forum.replica-watch.info
Here is my 508 with a distortion free crystal with Prof AR Coating: