Hi Ibrahiim,
On this example I do not plan to use any acid based cleaning. I like the dark patina and the potential for lose of material is not worth it. Only necessary to stabilize the current condition.
The age, I would hope 19th century, but this region kept producing traditional weapons for quite some time in the 20th century. Even today the region is still not very modernized.
All the best,
Iain
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