This vertical straight shape (Coiled coil of course) of the filament in this lamp means that in the US there is no standarts for the filament shape. In most part of the world (Especially in Europe) all filament lamps have exactly the same filament shape. This lamp in theory shouldn't pass the 1000 hrs but since its rated life is 6000 hrs i bet it is severally underdriven or it have a wrong rated life.

Actually there's a reason. Vertical filaments when operated base up or base down improve efficiency. The reason all 230v bulbs have the filament design you see is because the filaments are too long to be used in a vertical design.

Dave if they made double vertical in series....would that work for the European lamps? Just thought of this design myself!

Multi filaments in series in incandescent lamps in europe are used only in special purpose overdriven lamps. 230V halogen capsules indeed made with two vertical filaments in series.