The Omega Seamaster Aqua Terra is a classic timepiece. It is an iteration of Omega's historic Seamaster line, that dates back decades. The Aqua Terra line has 150M water resistance, which is enough for most land lovers, including myself. I am not afraid to take it in the ocean, the shower, lake, or any other body of water that my body takes me. The Aqua Terra comes with either a quartz or automatic movement, both of which I have owned and enjoyed. The 2503.33.00 is a more rare, automatic only aqua terra with a white face and blue hands. It came in several sizes, the most common being 39.2mm and 42.2mm. My watch is the smaller size, and it works best on my 6" wrist. It could fit smaller wrists, as I still have two and a half removable links on the bracelet, unlike my 2254.50 which has every link taken out. Here are some pictures: The Omega 2500 movement first debuted in 1999. It is a relatively robust movement, the first in its class with a Co-Axial escapement, a watch piece designed by George Daniels and adopted by Omega in 1993. Originally Omega put a beatrate of 28,800 bph in their 2500. Daniels never intended for the Co-Axial escapement to be used with such a high beatrate so the watch was revised to have a 25,200 beatrate in Omega's 2500C (second revision). There were other issues with the 2500 movement, mostly having to do with residue accumulating on a part of the movement, sometimes causing the watch to stop. By the 2500D revision, this had been figured out by redesigning a couple parts. (specific and technical information can be found online about the different revisions.) The movement is nicely finished and in the Co-Axial Aqua Terra you get a nice sapphire display back to admire the 2500. My watch has the 2500C - the 2503.33.00 was available with the 2500B or the 2500C. (note: edited, we are pretty sure this watch was discontinued before the 2500D was released, thank you user fskywalker) I will say that sometimes the watch will stop and will need a light knock - this stopping only happens when the watch is dead and I am winding it up. Once it has reached maximum power reserve it has no issues. The watch hands and indices look almost black when you look at them head on in low light. When indoors, it is sometimes a challenge to really be able to see the blue on the watch, occasionally you will get a glint of it, but to be truly appreciated this watch must be seen in natural light. Some of my best photos are in the car, with my hand either on the steering wheel or out the window. I find that sunlight provides this watch the best light for the blue. The bracelet is extremely comfortable. It does not pull hairs, and is very elegant and high quality. I have only had the clasp undo itself twice, both times caused by accidentally pushing the button that opens the bracelet. I'm not afraid to take this on a boat, I feel the watch is very secure to my wrist. The major appeal in this watch is definitely the color. As you can see, it shows very differently in different situations. I love looking down when the light catches it just right... The watch has been very accurate. Mine was purchased in 2011 and has yet to be serviced and is running slightly faster than COSC specs. The watch has a quick-date function, that allows you to change the date window with the crown. Position one winds the watch, position two changes the date and the final position changes the time. This watch IS hackable. Overall I give this watch a 10/10. It took me a little while to find one, but it was definitely worth it. It is head and shoulders above a quartz Aqua Terra. The watch weighs a bit more than its quartz counterpart, and there is something indescribable about seeing the second hand move like it does. My quartz Aqua Terra's second hand did not land directly on the indices which bothered it more than it probably should have. There are slight cosmetic features such as the word 'seamaster' being below the Omega logo, and the words 'Co-Axial' on the dial. Also note that the automatic versions get an applied "OMEGA" logo (omega spelled out, below the greek letter logo) while the quartz gets an applied decal that does not have as much interest in my opinion: Let me know if you have any questions about this beautiful piece. I think this one is staying with me for a long time. Edit: 11/29/15 Still loving the watch and added a mesh bracelet for a different look. I also made a really crappy review the day I got the watch that's on YouTube. I kind of want to delete it because it's not good but I know people like to just see it on film too. When I have time I'll make a better one. Just look up 2503.33 and you'll see it. thumbnail is two Aqua Terra's. Here is another video I shot that shows the watch in motion in better quality: Hope this was helpful. Don't hesitate to post, I'm happy to post specific pics or answer questions. This is an amazing watch and I'm thankful to own it.