Bombfrog · Microbrand · Germany
Bombfrog Carbon One
- Ronda 515
- 47.5 mm × 12.7 mm
- Sapphire crystal
- 200 m water resistance
Movement
- Caliber
- Ronda 515
- Type
- Quartz
- Tier
- Mid
- Complications
- Date
- Frequency
- n/a
- Power reserve
- n/a
- Hacking
- n/a
- Accuracy (factory)
- -10 / +20 s/month
Case
- Diameter
- 47.5 mm
- Lug to lug
- 53 mm
- Thickness
- 12.7 mm
- Lug width
- 22 mm
- Material
- Resin (Polycarbonate)
- Hardening
- —
- Water resistance
- 200 m
- Crown
- Push/pull
- Case back
- —
- Bezel
- Unidirectional, 60 clicks, 60-minute dive
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- MB-Microtec H3 tritium gas tubes (GTLS)
Bracelet
- Bracelet
- Not offered
Straps
- Strap 1
- Rubber, Neoprene strap with pin buckle, on spring bars
- Strap 2
- NATO
- Strap 3
- Leather, Leather strap with carbon-pattern finish
Weight
- Head only
- —
- On bracelet
- —
- On strap
- 74 g
Prices
About this entry
93% of key specs known. Missing: hardening.
Light quartz diver with tritium lighting. Brand specs: case "Ø 53mm x 51mm", 47.5mm bezel, 12.7mm case height, push-pull crown, AR-coated sapphire, unidirectional 60-click bezel, matt black dial, Ronda 515 Swiss quartz with date, 22mm lugs with spring bars, 200m, MB-Microtec H3 tritium gas tubes, screw-down caseback; 74g on the neoprene strap, 64g on the leather/carbon strap. The dimension drawings label 53mm from 12 to 6 (recorded as lug-to-lug) and 51mm across including the crown, so the 47.5mm bezel is recorded as the diameter. The spec table gives the case material as polycarbonate (recorded as resin), while the feature list calls it an "ultra-light carbon case"; the brand doesn't say whether the polycarbonate is fibre-reinforced. The neoprene page's spec table calls its strap "Silikon-Armband". One dimension drawing shows an earlier bezel with 15-30-45 numerals; all current product photos show the bezel with 10-50 numerals. Store pages show prices "inkl. MwSt." (including VAT).
Last verified: 2026-10-31. Edit or correct this entry.
Sources
- Bombfrog, Carbon One on neoprene strap (technical details, dimension drawing) accessed 2026-10-31
- Bombfrog, Carbon One on NATO strap (dimension drawing) accessed 2026-10-31
- Bombfrog, Carbon One on leather/carbon strap accessed 2026-10-31