Thanks for the various replies. I got the frizzen spring as tight as I could, nearly to the point where the cock/flint would not open it. This little item I have came from Dixie at least 20 yrs ago, and not an antique.
It works OK ... not great. If the pan has some powder & char cloth, most of the time it sparks enough to light the cloth, enough so then I can light the candle, but I wouldn't depend on it. Being from that source and era, it could be an Asian/Spanish/Italian/Indian etc copy, and clearly lacking good modern metalurgy.
I think the best place for this is on display on my bookshelf.