*I am back from travelling. Time to do the brief review as promised.
The temptation is great, had to buy the Seiko Prospex SRP637 and SRP639 – nicked named Monster Tuna.
The 3 new Seiko Prospex model available are SRP637, 639 and 641. They are now upgraded to the Prospex status ! with the NEW “X” logo printed on the dial. They are suppose to replace the earlier plastic shroud model aka Baby Tuna SRP233K, SRP234K and SRP236K.
The new model has been nick named the Monster Tuna (similar dial and hands to the Seiko Monster) and Sardine here locally. Obvious changes between model are the shroud (plastic vs steel) and the hands.
I decided to purchase only the SRP637 and SRP639, the SRP641 is available in Black PVD only ; which is not my taste.
Seiko SRP637 (Bracelet)
Lets start with the SRP637. This is the bracelet model.
Diameter: 47.5mm (excluding crown)
Lug width: 22mm
Lug to lug: 50mm
Water resistance: 200m
Movement: 4r36 Movement (automatic/ hand windable/ hackable)
Crystal: hardlex crystal
Bracelet: Stainless steel metal
The SRP637 wears big on the wrist. The metal shroud is thick and is also a welcome upgrade. Comparing to the earlier plastic version, the metal shroud will definitely outlast it. The bezel turns firm and accurate. The hands is similar to the monster with Seiko Lumbrite. The 4R movement is as usual accurate and reliable. The crown is threaded and has 4 turns. The chapter ring is made of plastic and needs careful selection when buying your watch ; as i have spotted some with mis-align ones !
The bracelet looks similar to the Seiko Monster except that its 22mm.
There is a build-in scuba extension on the bracelet.
The springbar used is the Seiko Fat springbar.
The compulsory lume shot, as usual BRIGHT !
Here is a shot against the earlier version (mod with a steel shroud).
On the left, the earlier version.
On the right the Prospex SRP637
Seiko SRP639 (Rubber strap)
This model Prospex SRP639 is selling like hot cakes here and is currently out of stock in many places. I believed its due to its slight cheaper price and the colour coordination.
Similar to the SRP637, except the bezel is in black. The markers is yellow painted from 12pm to 3pm. The minutes hand is also yellow in colour. The second hands is painted yellow at the bottom. The combination is very pleasing. I can see why its popular !
Here is a wrist shot.
For the rubber strap, its using the famous Z22 series rubber strap. This Z22 Seiko rubber strap needs an update ; its a little hard and will needs some boiling trick to make it comfortable for wearing.
*Seiko has made the SUN019,21 and 23 model with nice and soft rubber/silicon strap. For a Prospex watch…….. an update on the strap is needed.
Seiko SRP641 (Rubber strap)
This is the all black PVD model. I did not buy this model as PVD is not my taste (hard to swallow when there is a nick).
*Photos below are not mine but source from the net.
OK, here are some photos with some of the Tuna that i have. Enjoy !