Oak & Oscar · Microbrand · United States

Oak & Oscar Humboldt (Sellita SW300)

Limited · 2022 · Field, Sport

Oak & Oscar Humboldt ExP-02, laser-cut matte grey dial, fixed steel bezel, on steel bracelet
Photo: Oak & Oscar
  • Oak & Oscar Humboldt ExP-02 on bracelet, overhead
  • Oak & Oscar Humboldt ExP-02 on the wrist
  • Oak & Oscar Humboldt Seven Year, turned brass-toned dial with date at 6 and hand-cut brass bezel, on brown leather strap
  • Oak & Oscar Humboldt Seven Year, sapphire display caseback showing the sandblasted rotor
From $2,500 to $2,550
  • Sellita SW300-1
  • 39.5 mm × 12.4 mm
  • Sapphire crystal
  • 200 m water resistance

Movement

Type
Automatic
Tier
Upper
Complications
Date
Frequency
28,800 bph
Power reserve
56 h
Hacking
Yes
Accuracy (factory)
—

Case

Diameter
39.5 mm
Lug to lug
46.8 mm
Thickness
12.4 mm
Lug width
20 mm
Material
Steel
Hardening
—
Water resistance
200 m
Crown
—
Case back
Display
Bezel
—

Crystal & dial

Crystal
Sapphire
Shape
Double-domed
Anti-reflective
Yes (side not stated)
Lume
Super-LumiNova BGW9

Bracelet & clasp

Style
—
Links per row
—
Solid end links
Yes
Solid links
Yes
Link attachment
—
Taper
20 → 16 mm
Quick release
—
Half links
—
Clasp
—
Micro-adjust
—
Diver extension
—

Straps

Strap 1
Nylon, 20mm orange nylon strap, included with the ExP-02
Strap 2
Leather, Horween leather strap, included with the Seven Year
Strap 3
Nylon, 20mm navy nylon strap with orange stitching, included with the Seven Year

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
ExP-02bracelet and nylon strapMsrp2,550 USD$2,5502026-10-24link
Seven YearHorween leather and nylon strapsMsrp2,500 USD$2,5002026-10-24link

Variants

NameReferenceDialBezelStatus
ExP-02ExP02-Hummatte greyFixed steel bezel, machined in-houseLimited
Seven YearHUMSEVENYEARturned brassHand-cut 693 Eco Brass bezelLimited (10)

About this entry

68% of key specs known. Missing: weight, hardening, crown, bracelet links, link attachment, clasp micro-adjust.

The Humboldt in its Sellita SW300 build (the earlier ETA 2892-A2 build and the Humboldt GMT are separate models). ExP-02 (listed February 2026), the second watch of Oak & Oscar's Experimental Series: dial laser-cut, sandblasted matte grey and laser-marked with a "ghost script" in Chicago; fixed steel bezel turned in-house on a Schaublin 70 lathe; BGW9 on the hands only; time-only (no date window in the brand's photos, and the spec list has no date line); sapphire exhibition caseback. Brand specs: SW300 (the brand quotes 56h), 39.5mm case with drilled lugs, 12.4mm case height (whether the crystal is included isn't stated), 46.8mm lug-to-lug, 20mm lugs, 200m, double-domed sapphire with "multi-layer anti-reflective coating" (side not stated); bracelet of solid, fully articulated links tapering 20mm to 16mm, plus an orange nylon strap. The page doesn't name the case material; steel is recorded from the photos and the rest of the Humboldt line. Initial run of 20 (ten for Owners, ten for the public) sold by lottery; the brand says more will follow, so no limit is recorded. The store shows $2,550 with a compare-at price of $2,450; sold out on 2026-10-25. Seven Year (July 2022): made for Oak & Oscar's seventh anniversary and sold only at the 2022 Chicago Windup, ten pieces; hand-cut, untreated 693 Eco Brass bezel machined in-house, hand-turned dial showing the bare metal, sandblasted rotor visible through a sapphire caseback (brand photos), sandwich dial with BGW9, date at 6 (unlike the time-only ExP-02); delivered on a Horween strap and a navy nylon strap, no bracelet. Brand specs: SW300 (the brand quotes 42h), 316L mid-case and caseback, 39.5mm, 12.4mm case height, 46.8mm lug-to-lug, 20mm lugs, 200m, double-domed AR sapphire; sold out. Because the Seven Year has a date, no time-only complications are set on the model; the ExP-02 shows time only.

Last verified: 2026-10-25. Edit or correct this entry.

Sources