The Seiko 6106-8100 was introduced in 1968 and was made for a handful of years. Marketing ads actually did boast about its diving capability, that was “Proof” in 1969, all the way down to 229 feet! Other ads made it seem like the choice for surfers. Either way, it was seemingly a popular offering and the affordable. Models after 1968 often showed “resist” on the dial. The “Chevron” is like nothing else. It would have been among the very first to roll off the production line as well. So named for its distinct hour markers, each is a large split chevron of luminous material, with the exception of the 12, 6, and 9 which have squared corners. The 6106B features hacking seconds and a quick set function for the date. The day can be semi-quick set. This watch is in truly amazing condition and appears to be unpolished. Everything on the watch appears to be original except for the date wheel which is black and probably would have been white originally. The dial color is pretty incredible; it is a very vibrant blue that changes color in the sunlight. Service history is unknown but I have been wearing it for days and it has kept accurate time. Looking for $600 shipped