Hi! I have created account just to reply you. 
Anyway, I have very similar bangle (very rough, not polished edges) with the same hallmark.
Here are the photos:
It took me hours to find out… and connect the clues. It is from Libya - former Tripoli city heraldic is on - hallmarhttps://libyaherald.com/2016/03/libyan-ethnic-jewellery-a-traditional-industry-rooted-in-tripoli-and-other-libyan-cities-for-many-generations/k.
Also, same hallmark is here as well: Antique Libyan Silver Cuff Bracelet with Hallmark - 216 grams J106A | eBay
Anyway, both bangles seem to be rare, at least I could not find them.