Paul Prescott Not sure where I got this picture from ? An especially large and fine Parsons balance lever lock.
Paul Prescott I still don’t know where it came from, but the lock is in the Science Museum collection. Here’s a picture I look of the same lock when I was there recently.
Syd Waterman Patent Number 6350. Dated December 20th. 1832. Image of the brass shield often attached to the lock. Parson’s patent locks were manufactured by J.Duce . Patent.
