For sale I have a Casio PROTREK model PRW-3500 in great condition. I had one of these and then sold it, then bought this one, traded it and then traded it back... :) I actually like it a lot but prefer analog/quartz...

The original module was replaced with the 3444 which has STN technology and provided greater legibility and clear view of the data on the screen.

This works perfectly and the specs are, from the site:
  • Tough Solar Power
  • 200M Water Resistant
  • Low Temperature Resistant (-10 C / 14 F)
  • Full Auto LED (Super Illuminator) Backlight with Afterglow
  • 5 Daily Alarms (4 one-time and 1 snooze alarm)
  • Hourly Time Signal
  • Full Auto Calendar (Pre-programmed until the year 2099)
  • 12/24 Hour Formats
  • Button operation tone on/off
  • Accuracy: +/- 15 seconds per month (with no signal calibration)
  • Storage Battery: Solar Rechargeable Battery
  • Battery Level Indicator
  • Power Saving Function
  • Approx. Battery Life: 7 months on full charge (without further exposure to light)
  • Module 3444 ( STN ) from the PRW3510
The best part of this is that it takes regular 22mm straps, Nato, etc. so one can easily replace the strap and have a whole new look. The watch is great and the metal bezel also works best against scratches etc.

Comes with a Casio one piece strap as seen in the pictures and the Casio wood box, I also have the original Casio rubber straps. So this is a nice package.

Asking $119 for this “Explorer” tool watch shipped in the USA. Open to offers and trades as always especially for a Citizen Altichron.

Here are a few pics to show the looks and condition:

Watch Motor vehicle Gas Font Automotive wheel system
Watch Analog watch Clock Watch accessory Font
Watch Analog watch Automotive tire Clock Watch accessory
Watch Analog watch White Clock Watch accessory
Watch Analog watch Clock Watch accessory Circle
Watch Font Watch accessory Jewellery Gas
Hand Finger Automotive lighting Gadget Jewellery
Hand Automotive lighting Finger Gadget Bumper
Watch Analog watch Everyday carry Watch accessory Clock
Shipping box Material property Electric blue Everyday carry Cable