#thrusting key

[metaldetectingnordmannaland]

Viking age or medieval key, found last season in Østfold.

From a previous post about a fragment of a similar key we found some years ago:

This is only one of several types of advanced lock mechanisms that was used by the vikings. The mechansim is illustrated in fig. 2.

Other types of mechanism can be found here (in norwegian): http://goo.gl/UrJuLK