From a locksmith’s collection, this early rim lock (probably late 1800’s) is in nice clean condition. There’s no maker’s mark but both halves of the main body are marked inside either 606 or 909. It has the latch plate. The lock measures 3 5/8” x 2 1/2” x 3/4”. There’s a key that works the lock smoothly but is probably not original to the lock.