Model : PH-4A
Movement: 1.SEAGULL ST2130-0 （grade A with polishing）28,800 bph / 4 Hz without calendar display (single-position crown)
2.SEAGULL ST2130-1 （grade A with polishing）28,800 bph / 4 Hz with calendar display (two position crown)
Dial: Velvet Black with HYPERGLOW lume block index（over 8 hours visible in dark）
Hands: HYPERGLOW lume block（over 8 hours visible indark）
Water resitst: 20ATM/200m/20bar
Bezel: 120 click unidirectional
Bezel insert: ceramic with Hyperglow luminous
Glass: Dome sapphire / With Anti-reflection ( AR Coating)
Case& Bezel material: stainless steel 316
Crown: screw crown at 3 clock
Strap: Genuine leather
Case material: 316 stainless steel
Case diameter: 39.0 mm ( not include crown)
Bezel diameter: 40.0 mm
Case thickness: 12.5 mm (with glass), 10.5mm (without glass)
Lug Size: 20.0 mm
Lug to lug length: 48.0 mm
Weight: 82.5 g (with leather strap)
Wrist size: 15.5~22.0cm