I own a lot of ABC watches. (ok ok the Riseman isn't really an abC).
Anyway, one thing I really like is when you put the watch on and the altimeter is dead on self calibrated and perfect. It happens to all of my ABC's on occasion.
Well today, I wore my Riseman for the first time in weeks... maybe months. Its been quitely sitting in the glass top watch box with the other solar watches. I put it on this morning, went to work out, did some yard work, washed the car and took the trash up to the front of the property. On they way back down I checked the Alti.... yep... dead on.
Gotta love that!