After wearing it last week for the Marine Corps' 233rd birthday, and then for Veterans Day, I decided I needed a change from the black NATO strap that's been on it for a couple years now. Decided to try a green canvas strap, more in keeping with its jungle heritage!
On a lark I tried opening the back (first time ever) with my case wrench but it wouldn't budge. Very shallow indentations make it difficult to gain a good grip. Maybe it'll be another 42 years before it gets its first servicing! It still keeps excellent time regardless.