eBay

Seiko Prospex MarineMaster Professional 300M Saturation Dive Watch. Barely worn like NOS condition and no noticeable scratches.

This long discontinued JDM Seiko dive watch has all its original papers and packaging. Don't let the size intimidate you, this actually wears just as good as the Seiko SKX007/009 on my 6.5 inch wrist due to the mini lugs with the true lug-to-lug size of 44mm. The 7C46 caliber isn't your quartz, it is a high end high-torque quartz movement with an approximate 5 year battery life. Also included are some extra Seiko Tuna specific parts from different models and generations. See below for details:

OEM Stainless Steel Bracelet (with untouched Dive Extension Clasp) from SBBN015 - P/N: DA291JM
Seiko Tuna Shroud from SBBN015 (all brushed) - P/N: 85260769
Three additional factory shroud protector screws - P/N: 81507109
Extra Silicone OEM Strap from SBBN033. Brushed Pin Buckle but with black coated steel keeper - P/N: R01X012J9

Specifications:

Stainless Steel Case
Unidirectional Rotating Bezel
Dual Curved Hardlex Crystal
7C46 Quartz Caliber
Screw Down Crown
Accuracy of +/-15 Seconds per Month
Water Resistant to 30 Bar / 300m
Designed for Saturation Diving
LumiBrite Paint on Hands and Markers (Retains Light for 3 to 5 Hours)
Resistant to Magnetic Interference
Day/Date Display
Case Diameter: 46mm
Case Thickness: 14.7mm
Lug to lug: 44mm
Band Width: 22mm

Contiguous United States (48 States) shipping only. Selling as is.