Coughtrie R10 Lantern Installations
The Coughtrie R10 is a very rare bulkhead light nowadays, as it was replaced long ago by the CPS range of luminaires. As a result, not much information is readily available about them, but the body is thought to be made from cast aluminium, with a thick glass refractor lens. They could run GLS lamps.
London
These Coughtrie R10s are both still in use in the entrances to London's Bank Tube Station, all running what may be LED GLS lamps.