Seiko SBDC001 and Orient CFD0C001B
The Orient 300m diver is often compared to the Seiko 200m SBDC001 (aka Sumo) because both watches have similar case diameter and are of similar style. The Orient has a list price of JPY150,000 in Japan while the Sumo is only JPY60,000 (both prices exclude tax).
For a real life divers, there is no comparison. The Orient 300m is a professional diver that is designed to handle saturation diving while the Sumo is only good for scuba diving.
For the rest of us, we compare their physical attributes to decide which one we prefer. If you are choosing between the Orient and Seiko, here is a quick comparison for your reference.
Dial and hands
I don’t see any difference in the quality of the dial and hands except the chrome material surrounding the hour markers is slightly thicker on the Orient than that of the Seiko. You can see the difference in the picture below but when looking at the actual watches, the difference is less noticeable.
The Orient measures 45mm across and the Seiko is 44.5mm across (both excluding crown). Lug to lug measurement is 55mm for the Orient vs 52mm for the Seiko. The Orient is 16.5mm thick while the Seiko is 13mm.
The Orient’s lug width is 22mm while Seiko’s lug is 20mm.
Orient’s lug design does not require its bracelet to have end pieces. The end pieces are ‘incorporated’ into the watch case. I also notice that when using a nylon band on the watch, the limited space in the lugs actually makes the watch head stay firmly on where you want it to sit on the band.
The lugs seem to be a weak point for the Sumo. 20mm appears to be a bit small for a 44mm watch. Also, the long lugs create a gap when wearing the watch on a rubber strap (see picture below).
Seiko SBDC005 CFD0C001b
Bezel and crystal
The Orient has a 60-click bezel whereas the Seiko has one with 120 clicks. Seiko divers are known for their crisp bezel action. The bezel on my Orient 300m feels a bit tight even though it has a better grip than the Seiko. However, the bezel insert on the Orient seems to be of better quality. I do not know what material is used here but the markings are engraved and painted white. It is very easy to read. The Seiko uses a standard aluminum bezel and markings are printed on it.
The Orient is installed with a flat Sapphire crystal with anti-reflection coating while the Seiko uses a slightly curved Hardlex crystal.
Case and finishing
The Orient uses a more standard case design whereas the Seiko has some unique design elements incorporated on its lugs and on both sides of its case. The finishing on both watches are probably on par although the Seiko looks like it may need more man hour for the finishing work.
Both watches have beautiful casebacks. Seiko uses brushed finishing on the Sumo’s caseback while Orient chose to do a polished finish. The main difference between the two watches is written on the Orient’s caseback. It is a HE gas diver which the Seiko is not. According to Orient’s website, the watch has a special case design that prevents helium gas from entering the watch.
Besides the above differences, the wetsuit extension on both bracelets are also different. The Orient uses a better wetsuit extension which is easily released by the via catch on the buckle. This system is the same as the one found on the Seiko Marinemaster. The Seiko Sumo uses a simplified wetsuit extension as shown in the picture below.
Lastly, you should note that both watches beat at 21,600bph. The Seiko is powered by the 6R15 movement which comes with stop second and handwind features. The Orient is powered by the 46N4A movement that has a power reserve indicator. Unlike the Seiko movement, it does not come with stop second and handwind features.