Bull's lightsaber

Bull's lightsaber was the weapon constructed and carried by Bull before and during the. It was briefly used by Vin Garth but was then carried by Zur Cen as his first lightsaber.

Skirmish on Iriodania
The lightsaber was with Bull when he chased after Zur Cen. It was also used against Vin Garth who was able to deprive Bull of it during their battle, and later use it in order to block its owners own.

Apprenticeship
After the of its creator and owner Bull's lightsaber came into the possession of Vin Garth, who would then bequeath it to Zur Cen, whom he also took as his new  learner.