Had a few , they are great watches and really unusual .Price is really dependant on if its all genuine or aftermarket parts .Speedtimers used to command a bit more ,and the black dial was more popular than brown.6138 movement is good and fishbone bracelet is comfy,something sticks in my mind about the chrono not zeroing could a part thats hard to get now.These and the 6138 ufo's got me into this game and could be imported via ebay for £55-100....those were the days