I'm a little confused....
If I'm not mistaken, the 40mm doesn't exist in the old model.
you have the 5066 which is 36mm and the 5065 which is 38mm
the newer model is 5165 for the 38mm and 5167 for the 40mm.
can someone please correct me or confirm this?
I'm really getting to like this one but I want a gen strap for it. if the 38mm doesn't exist, it would be pretty tough to get one