Vertex · Microbrand · United Kingdom

Vertex M100A

Ref. M100A · In production · Field

Design reference: Vertex WWW Cal 59 (1944)

Vertex M100A, black dial with moulded lume numerals and small seconds, brushed steel case, grey NATO strap
Photo: Vertex
  • Vertex M100A on the wrist
  • Vertex M100A lume shot
  • Vertex M100AC, black DLC case, black NATO strap
  • Vertex M100AC on the wrist
From $2,777
  • Sellita SW260-1
  • 40 mm × 12.2 mm
  • Sapphire crystal
  • 100 m water resistance

Movement

Type
Automatic
Tier
Upper
Complications
Hours, Minutes, Small seconds
Frequency
28,800 bph
Power reserve
38 h
Hacking
Yes
Accuracy (factory)
—
Grade
Top
Modifications
Custom Vertex "Cal59" ratchet rotor weight, blued screws

Case

Diameter
40 mm
Lug to lug
49 mm
Thickness
12.2 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
100 m
Crown
Screw-down
Case back
—
Bezel
—
Finishing
Brushed

Crystal & dial

Crystal
Sapphire
Shape
Box, domed
Anti-reflective
Yes (side not stated)
Lume
Super-LumiNova X1 C3

Bracelet

Bracelet
Not offered

Straps

Strap 1
Leather, M100A, black
Strap 2
NATO, M100A Admiralty grey and Vertex NATO; M100AC red (DLC hardware) and black
Strap 3
Rubber, M100AC, two-piece

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
Steelblack leather, Admiralty grey NATO and Vertex NATO strapsMsrp2,083.33 GBPex VAT$2,7772026-10-31link
Covert DLCrubber, red NATO and black NATO strapsMsrp2,083.33 GBPex VAT$2,7772026-10-31link

Variants

NameReferenceDialConfiguration
SteelM100Ablackblack leather strap, Admiralty grey NATO and Vertex NATO straps
Covert DLCM100ACblackrubber two-piece strap, red NATO with DLC hardware and black NATO straps

About this entry

87% of key specs known. Missing: weight, hardening.

40mm homage to the Vertex WWW Cal 59 worn by British soldiers, sailors and airmen in WWII ("Dirty Dozen"), with the military broad arrow on the dial; "A" for automatic. Brand specifications: brushed 316L case, 40mm, 12.2mm deep (not stated whether the double-domed box crystal is included; recorded as the total), 20mm lugs; 31-jewel no-date Sellita SW260-1 Top grade ("Top Execution") with hacking small seconds, Nivaflex hairspring, 28,800 vph, "calibrated in three distinct positions" (Sellita's Top grade is adjusted in five), blued screws and Vertex's Cal59 ratchet rotor weight; the M100AC page adds rhodium finish with Côtes de Genève and a 38-hour reserve; double-domed sapphire box crystal with "AR08 + AR06" anti-reflective treatment (sides not stated); 100m with a screw-in ("locking") crown; moulded X1 grade C3 Super-LumiNova dial and syringe hands. Lug-to-lug: the shared technical-specs section on both pages says 49mm, the short spec lists say 48.5mm (M100A) and 48mm (M100AC); 49mm recorded. The M100AC ("C" for Covert) is the same watch in a brushed black DLC-coated case at the same price, so it is a variant; it comes with a rubber two-piece strap, a red NATO with DLC hardware and a black NATO, the M100A with a black leather strap, an Admiralty grey NATO and a Vertex NATO, both in a Peli case. Prices are the store's ex-VAT figures (the pages show GBP 2,500 including VAT); both "returning to stock 06/11/2026" on 2026-10-31. Caseback and weight are not published.

Last verified: 2026-10-31. Edit or correct this entry.

Sources