1991 Stocker&Yale 490 Field Watch
![1991 Stocker&Yale 490 Field Watch Front View](http://kronometric.org/tcw/mil/sandy/490Ecust/fr512x530.jpg)
MIL-W-46374E Type 1. NSN 6645-00-066-4279. Dec 1991 Contract. ETA 2801-2 17-jewel, hacking 28,800 bph movement. Olive drab nylon 1-piece strap.
![Generic Crown Side View](http://kronometric.org/tcw/mil/sandy/490Ecust/obh512x340.jpg)
The standard 1.5mm flat crystal has been replaced by a 2.0mm double-domed crystal. The crown is a generic type; the original was worn down and hard to grip while winding.
![Back details Back View](http://kronometric.org/tcw/mil/sandy/490Ecust/crn512x321.jpg)
Another view of the new crown, shown in setting position. The small plug that allows access to the stem removal pin was missing and has been replaced by a small size '0' screw.
![Replacement crystal Back View](http://kronometric.org/tcw/mil/sandy/490Ecust/xtl512x201.jpg)
The double-domed crystal has greatly improved the readability of this watch from all angles and seems to be much clearer than the flat crystal, probably because it is new.
![Luminous seconds hand Back View](http://kronometric.org/tcw/mil/sandy/490Ecust/lum512x472.jpg)
The seconds hand tip was lumed with modern luminous non-tritium paint. Never really understood why the military stopped requiring luminous seconds hands.
This is one of my favorite military watches to wear, probably due to it's personalization - especially the crystal. The watch is a light 25g including the strap. It is 40mm wide including the crown, 39½mm tall and 13mm thick.