Perhaps my favourite of the many renditions of the Brooklyn cocktail due to being dry yet made approachable by faint sweet maraschino and bittersweet herbal...
I think we're in agreement. Jacob A. Grohusko’s 1908 “Jack’s Manual” calls for “50% Ballor Vermouth” (spelt with a ‘B’ not a ‘V’). Please follow the "Grohusko's recipe" link above for a Brooklyn made with sweet vermouth.