Postby blakstone » Fri Sep 29, 2006 12:31 am
SBL is Samuel Boyce Landeck, who registered his mark in London in 1879 and died in 1907. He was indeed an importer, with marks also registered in Sheffield and Chester. His mark appears on items imported from both the Netherlands and Germany; given that Dutch hallmarking was (and is) much more stringent than German, I expect your seal is from the latter, assuming there are no other marks.
Hope this helps!