English to Russian Tech/Engineering Poetry & Literature

There is a wooden box. The kind guitars usually come in. There’s a swirly pattern on the surface, all leaves and vines, but pieces of the inlay are missing and the finish is dull and stained. A leather strap is wound around it. I bend down on my good knee and see that the case doesn’t close properly. ***The prong’s stuck down inside the bottom part of the lock***.

не понимаю по описанию, какое устройство замка имеется в виду
есть идеи?