I picked up a set of old tungsten-titanium Great Big Bertha's about five years ago while I was stationed in Korea. Most I've seen came with black RCH 96 graphite shafts (which my 2-iron I bought separately has), but this set (3-9 irons, P-, A- and S-wedges) has silver shafts that read "Super GBBI" in large letters with "Designed by Callaway for Japan" beneath it. What I'm wondering is what difference, if any, there is between the two. Was it merely a marketing ploy, or is there really a difference between them? It's more curiosity than anything, but if anyone can shed some light on the subject I'd appreciate it!
Thanks,
Nick