Undone · Microbrand · Hong Kong
Undone Aquadeep K9 Crystal (NH72)
- Seiko NH72A
- 43 mm
- Sapphire crystal
- 300 m water resistance
Where to buy
- Undone (Black)Worldwide
Movement
- Caliber
- Seiko NH72A
- Type
- Automatic
- Tier
- Entry
- Complications
- Skeleton
- Frequency
- 21,600 bph
- Power reserve
- 41 h
- Hacking
- Yes
- Accuracy (factory)
- -20 / +40 s/day
Case
- Diameter
- 43 mm
- Lug to lug
- —
- Thickness
- —
- Lug width
- 22 mm
- Material
- Other (K9 optical crystal (glass))
- Hardening
- —
- Water resistance
- 300 m
- Crown
- —
- Case back
- Display
- Bezel
- 60-minute dive
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- —
- Lume
- luminous hands (type not stated)
Bracelet
- Bracelet
- Not offered
Straps
- Strap 1
- FKM rubber, 22mm FKM rubber strap (black in the photos), plus a free extra rubber strap in a colour of the buyer's choice
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| Black | — | Msrp | 1,150 USD | $1,150 | 2026-10-24 | link |
Variants
| Name | Reference | Dial | Status |
|---|---|---|---|
| Black | AQD-DEP-K9B | skeletonised, showing the ruthenium-grey NH72 movement, with six SZ crystal stones and silver-tone lumed hands | Limited |
About this entry
60% of key specs known. Missing: lug-to-lug, thickness, weight, hardening, AR coating, crown.
Undone's Aquadeep dive watch with case, bezel and caseback "crafted from optical-grade K9 crystal" (an optical glass), giving a "360° view" of the skeletonised movement; listed June 2026 as a "Limited Release" (no number of pieces given) in two versions that differ in the movement's plating: this Black one on the Time Module (Seiko) NH72 "gray" (ruthenium-grey plating) and the Silver on the NH70 (Aquadeep K9 Crystal (NH70), a separate model because the caliber differs; TMI's spec sheets for the two differ only in plating). Spec table: "Automatic NH72 (gray)", "K9 Crystal case, bezel & caseback", sapphire glass, 43mm case diameter, 22mm lug width, 22mm FKM strap, 300M / 30ATM. The description adds six "SZ" crystal stones set in the dial, silver-tone hands "filled with super luminous", and a free extra rubber strap in the colour of the buyer's choice. The titanium Aquadeep builds are separate models. No thickness, lug-to-lug, weight or crown details are published. The listing was sold out on 2026-10-30. Editions. Black (AQD-DEP-K9B, USD 1,150): clear case, dark grey skeleton movement, black strap in the photos.
Last verified: 2026-10-30. Edit or correct this entry.
Sources
- UNDONE, Aquadeep K9 Crystal Black (SKU AQD-DEP-K9B) accessed 2026-10-30
- UNDONE, Aquadeep K9 Crystal Silver (SKU AQD-DEP-K9; same spec table with the NH70) accessed 2026-10-30