With the caviat that I'm no expert, I'll wade into your question, nonetheless, with Mark Twain's assurance of a Christian holding four aces. I own a 1719 Tower Colonel's musket, a last survivor manufactured to ship a plug bayonet. Its lock lacks a frizzen bridle as you can see from the photo. The subsequent model of British martial arm, (first to be known as the Brown Bess) which evolved from this piece and continental arms also lacked the bridle, as this 1729 Brown Bess lock illustrated demonstrates. The next significant improvement to the Land Pattern Brown Bess, that of 1740, added a bridle which was standard from then on for the next nearly 100 years. The book 'Bess photographs are from page 17 of Goldstein@ & Mowbray's superb book "The Brown Bess". So, at least as far as the British were concerned, a firzzen bridle was first permanently affixed to its regulation musket locks with the improvement of 1740. One suspects some civilian gunmakers led the way whilst others lagged behind.