For sale as I'm clearing out my collection. This is a TWSBI DIAMOND 580 AL F Iceberg. I inked it once with Pilot Iroshizuku Ama-iro and tested it. I felt it was a very well-made steel nib. The sparkling transparent body is very beautiful, and the ink looks great in it. I felt it was a high-quality fountain pen in terms of writing feel, weight, balance, and appearance. I will clean it and take measures to prevent water damage before shipping. All accessories are included, such as the maintenance tools and grease. TWSBI TWSBI Iceberg Iceberg Diamond 580 DIAMOND 580 Fountain pen Writing instruments Writing supplies Stationery Stationery