The 49ers pose a difficult task when trying to tweak their design. How many unique ways can the number 49 or SF be done and still look appealling on a helmet? Well, here are two designs that I came up with.
The top helmet depicts an adaptation of the 49ers logo used from 1946 to 1967.
The bottom helmet is sans logo, because if there's any team out there that would make sense not to have a logo, it's the 49ers. Their heads could look like big shiny gold nuggets.