Bombfrog · Microbrand · Germany

Bombfrog BT-25

In production · Diver

Bombfrog BT-25 in steel on a neoprene strap
Photo: Bombfrog
  • Bombfrog BT-25 in steel on the steel bracelet
  • Bombfrog BT-25 Black Edition on a neoprene strap
  • Bombfrog BT-25 Kampfschwimmer edition on a neoprene strap
  • Bombfrog BT-25 Black Edition EOD on the black bracelet
  • Bombfrog BT-25 Black Edition Minentaucher on a neoprene strap
From $643 to $772
  • Seiko NH35A
  • 47 mm × 16 mm
  • Sapphire crystal
  • 500 m water resistance

Movement

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

Case

Diameter
47 mm
Lug to lug
51 mm
Thickness
16 mm
Lug width
22 mm
Material
Steel (316L)
Hardening
—
Water resistance
500 m
Crown
Screw-down
Case back
Solid, screw-down
Bezel
Unidirectional, 120 clicks, aluminum insert
Finishing
Brushed

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
Yes (side not stated)
Lume
MB-Microtec H3 tritium gas tubes (GTLS)

Bracelet

Bracelet
—

Straps

Strap 1
Rubber, Extra-long neoprene strap with pin buckle
Strap 2
NATO

Weight

Head only
—
On bracelet
236 g
On strap
130 g

Prices

VariantConfigurationTypePriceUSDAs ofSource
Steelneoprene strapMsrp573 EURincl. VAT$6432026-10-24link
SteelNATO strapMsrp573 EURincl. VAT$6432026-10-31link
Steelsteel braceletMsrp658 EURincl. VAT$7392026-10-24link
Black Editionneoprene strapMsrp596 EURincl. VAT$6692026-10-24link
Black EditionNATO strapMsrp596 EURincl. VAT$6692026-10-31link
Black Editionsteel braceletMsrp685 EURincl. VAT$7692026-10-24link
Kampfschwimmerneoprene strapMsrp597 EURincl. VAT$6702026-10-24link
KampfschwimmerNATO strapMsrp597 EURincl. VAT$6702026-10-31link
Kampfschwimmersteel braceletMsrp683 EURincl. VAT$7672026-10-24link
Black Edition EODsteel braceletMsrp688 EURincl. VAT$7722026-10-24link
Black Edition EODNATO strapMsrp620 EURincl. VAT$6962026-10-31link
Black Edition Minentaucherneoprene strapMsrp620 EURincl. VAT$6962026-10-24link
Black Edition MinentaucherNATO strapMsrp620 EURincl. VAT$6962026-10-31link

Variants

NameDial
Steelblack
Black Editionblack
Kampfschwimmerblack
Black Edition EODblack
Black Edition Minentaucherblack

About this entry

87% of key specs known. Missing: hardening, bracelet offered.

Bombfrog's large automatic diver with tritium lighting; the brand says its construction follows the DIN 8306 diver's-watch standard. Brand specs: brushed 316L steel, "12-6 H 51 mm | 3-9 H 47 mm" (recorded as lug-to-lug and diameter; the feature list's "diameter of 51 mm" is the 12-6 figure), total height 16mm, screw-down engraved caseback, 7mm screw-down crown, AR-coated sapphire, MB-Microtec H3 tritium gas light sources, 120-click aluminium bezel, NH35A automatic (24 jewels) with date, 22mm lugs, 500m, serial number. Weights from the steel Edelstahl Edition pages: 130g on the neoprene strap, 236g on the heavy steel bracelet (safety clasp, "Sicherheitsverschluss"); the other pages copy one figure or the other regardless of strap, and the feature lists say 130g or 236g. Variants: Steel (Edelstahl Edition); Black Edition (black IP-coated case and bracelet, same specs); Kampfschwimmer (German Navy combat swimmers' logo, steel case; its bracelet page names a folding clasp); Black Edition EOD (Explosive Ordnance Disposal Master Technician logo, bracelet only) and Black Edition Minentaucher (German Navy mine-clearance divers' logo, neoprene strap only; its spec table copies the bracelet text, but the title and photos show the strap). The Black Edition neoprene page calls the strap "Extralanges Silikon Armband". Store pages show prices "inkl. MwSt." (including VAT).

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

Sources