Manufacturer | Seiko |
Caliber Number | M705, M705A |
Movement Type | Quartz, digital |
Display Type | Nematic Liquid Crystal with Field Effect Mode (FEM) |
Diameter | 34.2mm |
Height | 6.48mm |
Jewel Count | No jewels (0) |
Beat Rate / Frequency | 28,800 bph / 4 Hz |
Accuracy Rating | Less than 15 seconds/month |
Battery Cell # | CR2025 (lithium, 3 V) |
Battery Life | 3 years |
Current Consumption | 2.2 uA (movement) / 1.8 uA (circuit block) |
Regulator | Trimmer condenser |
Functions | See below… |
Country of Manufacture | Made in Japan |
Known Models | Seiko Scubamaster (Ref: M705-5A10, M705-5A00) (Add your watch to the comments below…) |
The Seiko caliber M705 (M705A) is a digital quartz watch movement found in various Seiko digital Scuba Diver’s watches.
In Seiko’s own words:
“The Seiko Scubamaster Cal. M705 is a computerized diver’s watch featuring a built-in electronic depth gauge and automatically displays the data required in making a dive.”
Functions:
In addition to the normal digital time and calendar display, the M705 also has:
- Depth meter up to 80m
- Dive display
- Dive table
- Diver’s log
- Alarm (daily)
- Warning/communication beeps
- Illuminating backlight
- Battery life indicator (EOL)
- All Clear (AC) Reset
Instructions Manual:
Official M705 Technical Guide/Tech Sheets (pdf):
Additional Resources:
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