AUTOMATIC MECHANICAL MOVEMENT: SEIKO/SII NH05B DATE 

Hour + Minute + Center-Second + Date

Specifications:

  • Size: 7 3/4''', diam.17.50 mm or 8 3/4''', diam.19.80 mm (with dial support)
  • Height: 5.92 mm
  • Static accuracy per Day: - 35 + 55 sec
  • Isochronisms per Day: - 35 + 35 sec
  • Posture difference: under 90 sec
  • Running time: more than 40 hours
  • Vibration frequency: 21'600 per Hour
  • Jewels: 21 pcs
  • Lift angle: 52 degree
  • Antimagnetic:  DC => 4800 A/m
  • Quick date correction
  • Winding with ball bearing

SOLAR QUARTZ MOVEMENT: EPSON VS17A

Hour + Minute + Center-Second

Specifications: 

Movement dimension: 

  • Size (ligne):   5 1/2'''

Height (mm):   2.79

Time Standard:

  • Frequency of quartz oscillator:    32'768 Hz
  • Accuracy:   + - 20 seconds per month
  • Operating temperature range:   - 5 degrees C to + 50 degrees C

Indicator / Functions:

  • 3 Hands with Reset switch:    Hour / Minute / Second
  • Setting mechanism / MANUAL: Crown at normal position: Free
  • Crown pulled out 1st click: Time setting / Reset 
  • Power depletion warning function:  Second-hand moves at 2-second intervals when voltage is 1.10V
  • Running time: Approximately 6 months (After fully charged)

Features:

  • Jewels:  2 Jewels 
  • Anti-magnetism:  Over 1'600A/m (Direct current magnetic field) Driving current consumption Approx. 0.40microA (1.35V)
  • Operation stopping voltage:  1.0 V
  • Solar Cell type:   Amorphous silicon solar cell 

Secondary Battery. This secondary battery is without any environmentally harmful substances! Do never set and charge a silver oxide battery, there is a possibility of battery explosion!

  • Type:  Titanium-lithium-ion secondary battery
  • Lifetime:  8 - 10 years
  • Size:  Diam. 5.80 x t 1.65mm
  • Nominal voltage:  1.5 V
  • Capacity:  1.8 mAh 

Charging time:

  • By fluorescent lamp, inside the office (700 Lx):   impossible for a full charge, 45 hours to operate steadily
  • By fluorescent lamp, 30W / 20 cm (3'000 Lx):   ~85 hours for a full charge, 10 hours to operate steadily
  • By Sunlight, cloudy weather (10'000 Lx):    ~25 hours for a full charge, 3 hours to operate steadily
  • By Sunlight, fine weather (100'000 Lx):    ~4 hours for a full charge, 25 minutes to operate steadily
  • Overcharge prevent function:    An overcharge prevents function is equipped to avoid deterioration and breakage of the secondary battery.

When charging the watch, do not place it too close to a fluorescent lamp or other light sources as the watch temperature will become extremely high, causing damage to the parts inside the watch.