All are American forms:
1.Lever’s Vectis - checkered ebony handle, unplated steel blade, unmarked, 36cm,  VFC
2.Lowder’s Vectis - smooth bulbous ebony handle – unplated steel blade – ‘MARTIN ALBANY NY’,  34cm, VFC
3.Gemrig’s Double Vectis, unplated, 25cm., VFC