Romano-Celtic Iron Dagger. A Romano-Celtic iron dagger, c. 1st - 4th Century AD, the wide blade sharpened and set into a bone handle with remains of iron guard and pommel. Well-preserved and resembles Roman iron daggers of the period. L: 11 7/8â (30.1 cm). Some loss to edge of blade but a very interesting and unique piece! Ex Los Angeles private collection.