What is LJGIBBS's ringtone?

Hello everyone!
So, I'm desperately looking for the ringtone of LJ. GIBBS (NCIS)...
I feel like this ringtone is UNFINDABLE, but I think you all might have the answer to my request in this forum! :D
It's a very discreet and simple ringtone and I just can't seem to find it!
Anyway... I just hope that a kind soul will be able to help me!!!
Thank you in advance for your responses!
@+
Bock

PS: For your information, if it helps, GIBBS's phone is either a Moto V600 or a Moto V620... Personally, I lean more towards the V600 because of the slimmer shape. So if it helps, I think it's a default ringtone from these phones... I've looked into that, but I can't download them!!!

Thank you all