Here, our banks don't allow helmets, mask and sunglasses. I don't think the rules apply to jewlry stores though. However, one guy still manage to rob a standard chartered bank and got out of the country. It was some years ago.
https://www.todayonline.com/singapore/5-years-jail-caning-stanchart-robber-who-fled-singapore-s30000-2016
RE: American robs jewelry store in Da Nang, gets busted almost immediately