@ ifly65,
taking of the braclet on a model where you can touch the springbars from the outside is real easy.
I always use a toothpick , so you can't damage the case , and push them out of the lughole.
Putting it back into place is also very easy . Put one side of the springbar into the hoel and place the other end against the back of the case.
The pick up the same toothpick push in the springbar and gently push the psringbar in between the lugs "voila"
My MBW shows 1680 as typenumber and the serial L342295 another "new" thing is that the lugholes are almost 2 mm which is also the case with yours if i'm not mistaken.
Some members told me that they have never seen this combination of type and serial number let alone the bigger lugholes.
I'm really interested how your MBW is between the lugs.
Carpe Diem
Cats