Hemel · Microbrand · United States
Hemel Air Support 42mm
- Seagull ST1901
- 42 mm
- Sapphire crystal
- 100 m water resistance
Where to buy
Movement
- Caliber
- Seagull ST1901
- Type
- Hand-wound
- Tier
- Mid
- Complications
- Small seconds, Chronograph
- Frequency
- 21,600 bph
- Power reserve
- —
- Hacking
- —
- Accuracy (factory)
- —
Case
- Diameter
- 42 mm
- Lug to lug
- 49 mm
- Thickness
- —
- Lug width
- 22 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 100 m
- Crown
- Push/pull
- Case back
- Display, screw-down
- Bezel
- 120 clicks, ceramic insert, lumed
- Finishing
- Polished
Crystal & dial
- Crystal
- Sapphire
- Shape
- Double-domed
- Anti-reflective
- Yes (side not stated)
- Lume
- Super-LumiNova C3
Bracelet
- Bracelet
- —
Straps
- Strap 1
- Leather
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| Airfoil Standard Black | — | Msrp | 549.99 USD | $550 | 2026-10-24 | link |
Variants
| Name | Dial |
|---|---|
| Airfoil Standard Black | Black |
About this entry
73% of key specs known. Missing: thickness, weight, hardening, bracelet offered.
The 42mm size of Hemel's ST19 Air Support pilot chronograph, sold now only as the "Standard Black / 42 mm" option of the Airfoil listing (no SKU; the 40mm options are in Air Support 40mm). The Time Bum describes this as the HF case developed for the original Air League Chronograph (a 2020 League of Microbrands pre-order offered with an ST19, a 7753 clone or a Sellita SW510) and used for the 2021 Airfoil: 42mm, 49mm long, 22mm between the lugs. Brand specs: Seagull ST19 hand-winding caliber, 45-hour power reserve claimed; 316L polished case, 42mm, 49mm lug to lug, 22mm lugs, 100m; screw-down exhibition caseback; signed push/pull crown; double-domed sapphire with AR coating (side not stated); 120-click rotating ceramic bezel with C3 lume; matte black dial with C3. Thickness not recorded: Hemel gives 13.4mm for both sizes, The Time Bum measured 13.8mm on the 42mm Airfoil, and neither says whether the crystal is included. The store's photos don't distinguish the two sizes. No weight published or found.
Last verified: 2026-10-30. Edit or correct this entry.
Sources
- Hemel, The Hemel Airfoil (product page, 40 and 42mm specifications) accessed 2026-10-30
- The Time Bum, Hemel Airfoil review (42mm case dimensions) accessed 2026-10-30
- The Time Bum, Hemel Air League Chronograph Special Edition (2020 League of Microbrands project) accessed 2026-10-30