Steel-nibbed Platinum fountain pens

These are steel-nibbed Platinum fountain pens I (or ‘we’) have here, excluding:

• the thirty-odd Preppy and Pernapep pens here and there around the house
• my wife's Procyon Porcelain White and Prefounte Dark Emerald
• the second Balance Cool Crystal Blue now ‘transferred’ into her service
• a few desk pens of different models

None of the pens shown in the photo are inked at the moment.