![Roman key of iron](https://coimages.sciencemuseumgroup.org.uk/335/440/large_thumbnail_smg00182723.jpg)
Selection of 6 ancient keys consisting of: - 1) Roman key of iron
Selection of 6 ancient keys consisting of: - 1) Roman key of iron, part of stem corroded, reminder of green patination; 2) bow of a Roman key, pierced with trefoil ornament; 3&4) two Roman keys and 5&6) two ring keys