Antique Cast Iron Bolt Lock with Original Keys

Scarce antique cast iron bolt lock. Measures 4” wide, a bit over 3” tall and 1” thick. Elaborately etched pattern on the front with hand forged iron “floral” keys. It does not close *quite* all the way after so many years but is still wicked cool! Key on the left remains fixed while the key on the right operates the bolt action. Some rust and chipped paint from age and use. If memory serves, this one was from a European prison. Can you even imagine?