1681. A rest for a soldering iron:
Submitted by Willem Kossen
1682. A Peg Lock to keep the hooks in place on a peg board:
1683. These gyroscopic controls were on display at the Wright Patterson Air Force Museum, the placard next to them said:
Fuselage section from a Sperry "Messenger" airplane converted into an experimental "guided missile" in 1922. Gyroscopic equipment was installed in the airplane to control its attitude and direction of flight. Later refinements of gyro controls led to the development of airplane autopilots.
1684. A military caltrop, also called a tetrahedron:
Stopping enemy traffic at night proved to be a difficult problem. One of the more interesting attempts to stop Communists trucks involved dropping tetrahedrons on North Korean roads. Those trucks that were left stranded could then be destroyed by UN fighter-bombers the following morning. In the end, the concept proved to be impractical and was discontinued.
1685. The most popular guess for this box is that it's a station that held a night watchman's key, but I haven't been able to find one like it one the web.
1686. A Washburn lead and linotype slug cutter for use by a printer, patent number 1,263,492:
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More discussion and comments on these photos can be found at the newsgroup rec.puzzles. Glenwood Gardens Park