This is a shot of my Seiko SBDC-001 aka the Sumo. The number on this watch dates the production date from July of 2007. I bought the watch in September of 2007 as a birthday gift to myself which means the watch will be three years old this summer. This watch has been a daily wearer pretty much. My two other watches are a vintage 6139 6005 that I only really take out on 'special' occasions and a little Seiko military style watch that gets used as my 'beater' watch for construction work or playing baseball etc. The Sumo gets worn all the rest of the time. I have had this watch adjusted by Seiko Canada twice under warranty. The first time the watch was running about 7 seconds fast a day. I asked Seiko Canada to tweek it for me to get it running a little closer to +-0 a day. After that adjustment the watch came back running 7 seconds slow per day. I had the watch regulated a second time and got excelllent results. I'm not sure if the second adjustment was the fix of if the movement has just settled but the watch deviates plus or minus 5 seconds per month! I know that's sort of hard to believe but I swear that the watch deviates so little that I haven't bothered to adjust the time in three months now. My experience with the 6r20 movement has been very good, I think it's a pretty good movement. The watch itself has held up well. The watch has a scratch on the bezel between 10 and 12 o'clock and a couple of small dings on the watch case. The bracelet is full of swirlies but is still solid. I keep on thinking about upgrading to a MM300 but considering how well this watch is working I find it hard to justify the change.