Hi,
The gold OS Dwarven Axe became prenerf with the Jan 2007 update, when they removed it from the HoH drop table. Same as Crystalline & Dwarven hammer back then. Today only inscriptable or purple versions drop.
It belongs together with the gold OS Crystalline, Dwarven Hammer, Krytan Axe, Tyrian Serpent Axe and Swamp Club to the most value gold OS weapon skins.
I am still shaking my head sometimes about my friend Ramon who custo'd a few of them for his warrior heroes.