From the Prima Collection

Polished Brass Vertical Edwardian Trinity Letter plate finished in High quality Polished Brass.
No polishing required

PB06A
Overall Size 11 1/8″ x 2 1/8″ (285mm x 62mm)
Opening Size 5 1/8″ x 1 1/4″ (130mm x 32mm)
Bolt Centres 7″ (180mm)

Polished Brass finish over solid brass

Care. a wipe over with a damp cloth is all that required ( maintenance free finish )