Was able to find it on line by searching "Jaeger 4990". The piece turned out to be the back plate of an acceleration gauge manufactured by the Jaeger Watch Co.

Round cover with a latch on it.

Other side of the same cover.

Interesting looking valve.

Switch

Some of the group checking out the site.

On the hike back to the vehicles.

The group was able to locate both sites using the photos from the crash report that Craig provided and they turned out to be interesting sites. Big thanks go to Craig Fuller of AAIR http://www.aviationarchaeology.com/default.htm for organizing the field trip.

THE END