Collectors are generally as competitive as racing drivers and sportsmen. They seek a way to win by being the collector who finds or owns the best and most rare items available, the best of the best! When it comes to rare and iconic helmets, you need not look any further than this: the Bell XF-GP Twin Window helmet, one of the most recognizable helmet models ever made. Plain and simple, you just never see any in existence, never mind having the opportunity...