Undone · Microbrand · Hong Kong

Undone Aquadeep (NH35)

In production · Diver

Undone Aquadeep Signal Black titanium dive watch with black dial on a black rubber strap
Photo: Undone
  • Undone Aquadeep Signal Yellow titanium dive watch with black dial on a yellow rubber strap
  • Undone Aquadeep Signal Orange titanium dive watch with black dial on an orange rubber strap
  • Undone AquaLume titanium dive watch with white luminous dial on a black and orange strap
  • Undone AquaLume Orange Rubber with white luminous dial on an orange rubber strap
  • Undone Aquadeep titanium case side with crown guard
  • Undone Aquadeep Signal Black see-through caseback showing the NH35 movement
  • Undone Aquadeep Hokusai-kan The Wave Forward with blue IP titanium case, blue bezel and blue wave dial on a blue strap
From $395 to $480
  • Seiko NH35A
  • 43 mm × 16.5 mm
  • Sapphire crystal
  • 500 m water resistance

Movement

Type
Automatic
Tier
Entry
Complications
Hours, Minutes, Seconds
Frequency
21,600 bph
Power reserve
41 h
Hacking
Yes
Accuracy (factory)
-20 / +40 s/day

Case

Diameter
43 mm
Lug to lug
—
Thickness
16.5 mm
Lug width
22 mm
Material
Titanium (Grade 2)
Hardening
—
Water resistance
500 m
Crown
—
Case back
Display
Bezel
60-minute dive
Finishing
sandblasted
Helium valve
Yes

Crystal & dial

Crystal
Sapphire
Shape
Double-domed
Anti-reflective
—
Lume
—

Bracelet

Bracelet
Not offered

Straps

Strap 1
Rubber, Black, yellow or orange rubber strap (Signal); orange rubber strap (AquaLume Orange Rubber)
Strap 2
Other, "Shadow Blaze" strap of Cordura fabric over orange silicone (AquaLume)
Strap 3
Other, Blue strap (Hokusai-kan The Wave Forward; material not stated)

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
Signalblack rubber strap (Signal Black)Msrp395 USD$3952026-10-24link
Signalyellow rubber strap (Signal Yellow)Msrp395 USD$3952026-10-24link
Signalorange rubber strap (Signal Orange)Msrp395 USD$3952026-10-24link
AquaLumeCordura and orange silicone strap (AquaLume)Msrp395 USD$3952026-10-24link
AquaLumeorange rubber strap (AquaLume Orange Rubber)Msrp395 USD$3952026-10-24link
Hokusai-kan The Wave Forward—Msrp480 USD$4802026-10-24link

Variants

NameReferenceDialBezelConfigurationStatus
Signal—black with white 3, 6 and 9 numerals, an orange minute hand and orange "AQUADEEP" print, no date windowgrey 60-minute dive bezel——
AquaLume—fully luminous white with black 3, 6 and 9 numerals and an orange minute hand, no date windowgrey 60-minute dive bezel——
Hokusai-kan The Wave ForwardCOL-AQD-HOKblue dial embossed with wave patterns, white numerals at 3 and 9 and the Hokusai-kan Museum logo, no date window; blue IP-coated caseblue 60-minute dive bezelblue strapLimited (1000)

About this entry

60% of key specs known. Missing: lug-to-lug, weight, hardening, AR coating, crown, lume.

Undone's titanium Aquadeep dive watch, "the highest water resistant configuration of all UNDONE diving watches to date", in its Time Module (Seiko) NH35A build. The same titanium case also comes with an NH36 day-date (Aquadeep (NH36), the Submerge), an NH37 (Aquadeep (NH37), the Submerge Carbon) and an NH34 GMT (Aquadeep GMT, the Trigalight GMT); the K9-crystal Aquadeep, the forged-carbon Aqua Carbon and the steel Aqua are separate models too. Spec table, the same on all five listings: Japanese TMI NH35A, Grade II titanium (sandblasted, per the description), double-dome sapphire crystal, 43mm excluding the crown (51mm including crown and crown guard), 16.5mm including the crystal, 50 ATM / 500m. The Signal pages add a manually operated helium escape valve at 10 o'clock, which OceanicTime's 2022 write-up also gives. None of the dials has a date window. The caseback photos show a see-through back. The 22mm lug width is from the rubber strap photos' file names ("22mm_rubber") and matches the 22mm Undone states for the 43mm Aquadeep K9 Crystal. Undone publishes no lug-to-lug, weight, lume type, bezel action or crown construction for this build (the Submerge description gives a screw-down crown). The listings are customizable through Undone's configurator, which the store data shows as USD 395, 415 and 435 price points (the Signal Yellow also holds two odd entries, "mczr_price_316_25" and "mczr_price_315", priced 395 and 415) without saying which options they cover; the USD 395 base price is recorded. Editions. Signal (USD 395): black dial with white 3, 6 and 9 numerals, an orange minute hand and orange "AQUADEEP" print; Undone sells it as Signal Black (AQD-369-BLK, listed 2023-07), Signal Yellow (AQD-369-YLW, 2023-07) and Signal Orange (AQD-369-BKO, 2023-05), which differ only in the colour of the rubber strap. AquaLume (USD 395): fully luminous white dial with black numerals and an orange minute hand, on Undone's "Shadow Blaze" strap of Cordura over orange silicone (AQD-369-LME, listed 2023-08) or on an orange rubber strap (AquaLume Orange Rubber, AQD-RBR-ORG, listed 2025-09). UNDONE × The Hokusai-kan Museum, The Wave Forward (listed 2024-10, COL-AQD-HOK, USD 480, 1,000 pieces with engraved serial numbers; sold out and tagged discontinued on 2026-10-30): made for Undone's 10th anniversary; all-blue design with a blue IP-coated titanium case, a blue bezel, dial and strap (the text names a ceramic bezel), embossed wave patterns and the museum's logo on the dial, no date window, a monotone "Great Wave off Kanagawa" on the see-through caseback and a printed blue rotor; its spec table is the same as the other listings' (NH35A, Grade II titanium, double-dome sapphire, 43mm, 51mm including crown and crown guard, 16.5mm including the crystal, 500m).

Last verified: 2026-10-30. Edit or correct this entry.

Sources