Miyota 8285
Factory specs
- Caliber
- 8285
- Made in
- Japan
- Frequency
- 21,600 bph (3 Hz)
- Power reserve
- 42 h
- Jewels
- 21
- Hacking
- —
- Hand winding
- Yes
- Accuracy
- —
- Diameter
- —
- Height
- 5.94 mm
- Functions
- Hours, Minutes, Seconds, Day, Date
- Same family
- Miyota 8205, Miyota 8215, Miyota 8217, Miyota 821A, Miyota 82S0, Miyota 82S5, Miyota 82S7, Miyota 8315, Miyota 8N24, Miyota 8N33
Day-date member of Miyota's 82xx "Standard Automatic" line laid out like a Rolex Day-Date: the full day name in a panoramic window at 12 and the date at 3. Miyota's own site was down for maintenance on 2026-10-25 and the "official tech drawings" PDF that Caliber Corner links redirected to its home page, so these figures come from Caliber Corner: 13 lignes (given as 29mm; 13 lignes is about 29.3mm, so the diameter is left blank), 5.94mm high, 21 jewels, 21,600 vph, about 42 hours, lift angle 49°, counterclockwise (one-way) winding rotor, hand winding, Parashock, quickset date, stem 065-212. Caliber Corner lists hacking as unconfirmed (a commenter says it hacks), so `hacking` is left blank, and gives no accuracy figure. It also says Miyota has discontinued the 8285, though parts sellers still carry it. Tier "entry" with the rest of the 82xx family.
Watches with the Miyota 8285
| Watch | Price from | Movement | Dia. mm | Thick mm | Crystal | Micro-adjust |
|---|---|---|---|---|---|---|
 Cadisen C8228 |
$140 | Miyota 8285 | 38 | 12 | Sapphire | — |
 Cadisen C8229 |
$140 | Miyota 8285 | 38 | 12 | Sapphire | — |
 Cadisen C8185 |
$150 | Miyota 8285 | 40 | 12 | Sapphire | — |
 Cadisen C8215 |
$150 | Miyota 8285 | 40 | 12 | Sapphire | — |