Contrary to popular belief, there were never any china factories located in this town - only showrooms and trading agents, for obvious reasons. Using the name was merely a matter of prestige and marketing, as the spa attracted royalty and other influential people.
The different spellings "KARLSBAD" and "CARLSBAD" are, of course, interchangeable.

M240504a
"AUSTRIA" placed above the superposed initials "H" and "S" set above "KARLSBAD".