Carriage key, North Eastern Railway, T-key type with square head stamped "NER Co" on one side and "Thewlis & Co Warrington" on other. Carriage key, North Eastern Railway
Carriage key, Lancashire & Yorkshire Railway, steel T-key with square head: 3 sides marked "LYRCo" 4th side "Thewlis & Co, Warrington". Carriage key, Lancashire & Yorkshire Railway
Carriage Key, North Eastern Railway, T-shaped, square-headed key, made by Thewlis & Co, marked "N.E.R.Co". Steel carriage key, North Eastern Railway