Antique portugal made reguladora chimeing clock

i do not know a hole lot about clocks but i will tell what i know this is a nice clock made in portugal at the top of the tag it has cp3/22/25 under that it says reguladora under that it has V.N. DE FAMALICAO-PORTUGAL it has the key with it the clock works really good it chimes on the hour and half hour if you have any questions i will try to get you a answer thanks for looking