Thread: ancient percussion lock identification

Im currently working on stabilizing the oldest wooden dwelling in the South Island built between 1840 and 1843.
All work is being done under an archaeological authority and supervision.
Im finding and bagging absolutely hundreds ( maybe a thousand by now ) of interesting artifacts that all get bagged and tagged.

This evening I found a book in a wall space above a window in the loft and also ..... an intact percussion lock.
Pretty cool when you are a mad keen hunter and gun nut.

Here are some images of the lock.
Im keen to have an idea of exactly what it is before I have a meeting in CHCH on Thursday with the lead archaeologist.









There are two small markings on the trigger sear visible in one of the close ups.
The hammer was left fully cocked and the sear is still mover freely.

Thoughts from those with knowledge about such items much appreciated.