Up for sale is this interesting Gruen Precision Alarm Chronograph. It's in TZ good condition and only shows signs of normal use. The watch appears to function properly (seems a little complicated to use for me) and keeps excellent time. It comes mounted on it's original bracelet. Also including a spare parts watch that is also running but the upper right sub register is inop. I have used a few bracelet links from it on the other watch since I have an 8" wrist. Both watches have fresh batteries. The watch is a pretty rare piece from what I can tell. It's also the same Miyota C3510 movement used in a few other brands like the Breitling Jupiter Pilot. It also comes with original box and manual. It's been a long time since I've seen one of these offered for sale anywhere else so only asking $100. More pics available.