The keyholder has been forced open with a knife and can be opened with anything. It will need a new one This product is a vintage British Telecom public payphone from the 1990s, designed in a retro style. It features a grey and cream colour scheme, making it a nostalgic collectable item. The complete payphone includes keys for operation, adding to its authenticity and charm as a piece of telephony history. This BT pay phone is a unique and stylish addition to any collection of vintage telecommunication equipment. keyhole has been fourth open and will need a new one. 
eBay