But not according to standard.
Standard is 13Â½ Lod, but in periods 11 is used. OK if marked.
Pure silver is 16 lod. To soft to use at 16=1000/1000
13Â½ is 13Â½ silver + 2Â½ cobber. 13Â½ is normal danish standard.
11 lod is 11 parts of silver and 5 parts of cobber.