DuFrane · Microbrand · United States
DuFrane Circuit Chronograph
- ETA Valjoux 7753
- 39 mm × 13.5 mm
- Sapphire crystal
- 100 m water resistance
Where to buy
Movement
- Caliber
- ETA Valjoux 7753
- Type
- Automatic
- Tier
- Upper
- Complications
- Small seconds, Chronograph, Date
- Frequency
- 28,800 bph
- Power reserve
- 48 h
- Hacking
- Yes
- Accuracy (factory)
- —
- Brand regulation
- -4 / +4 s/day
- Modifications
- Fully decorated, skeletonized rotor
Case
- Diameter
- 39 mm
- Lug to lug
- 47 mm
- Thickness
- 13.5 mm
- Lug width
- 20 mm
- Material
- Titanium (Grade 2)
- Hardening
- DLC, 1200 HV, on case
- Water resistance
- 100 m
- Crown
- Screw-down
- Case back
- Display
- Bezel
- —
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- Super-LumiNova BGW9
Bracelet & clasp
- Style
- —
- Links per row
- —
- Solid end links
- Yes
- Solid links
- —
- Link attachment
- —
- Taper
- —
- Quick release
- —
- Half links
- —
- Clasp
- —
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- Leather, Curved-end leather strap with a micro-adjusting titanium buckle, included with the bracelet
Weight
- Head only
- —
- On bracelet
- 100 g
- On strap
- 52 g
Prices
Variants
| Name | Dial | Status |
|---|---|---|
| Big Red | Red with silver registers | Limited |
| Bobby Pin | — | Limited |
| Customer Edition Racing Green | Racing green sunburst with 18kt gold registers | Limited (10) |
About this entry
84% of key specs known. Missing: bracelet links, link attachment, clasp micro-adjust.
DuFrane's 10-year anniversary chronograph, named after the Circuit of the Americas track. Both listings were sold out on 2026-10-25. Limited Anniversary Edition: 50 pieces in total across the Big Red and Bobby Pin dials, $2,299, "top grade" movement with a black anodized skeleton rotor. Customer Edition: 10 pieces, racing green sunburst dial with 18kt gold registers, $2,999, "elaboré grade" movement with a special skeleton rotor; the grade differs between editions, so no grade is recorded on the model. Both pages name the "ETA 7753" (recorded as the Valjoux 7753), regulated in-house to +/-4 s/day, with a 42-48h reserve. The photos show a bicompax layout (small seconds at 9, 30-minute counter at 3) with the date at 6 and no 12-hour counter, which differs from a stock 7753 (12-hour counter at 6, date at 4:30); the brand's caliber is kept, but the layout suggests a modified 7753 or another caliber. Grade 2 titanium case DLC coated to 1200 Vickers, reeded titanium bezel, 39mm, 47mm lug to lug, 13.5mm thick, 20mm lugs; 52g on the leather strap, 100g on the titanium bracelet. Water resistance: the Anniversary page gives 100m ("use caution around water as pushers can allow water intrusion"); the Customer Edition page says 10m, probably a typo, so 100m is recorded. Sapphire crystal with "5x" AR coating (side not stated) and a sapphire caseback engraved with the track outline. Tachymeter scale with a 130 mark; the chapter ring slopes 11 degrees. Includes a titanium solid end link bracelet and a curved leather strap with a micro-adjusting titanium buckle.
Last verified: 2026-10-25. Edit or correct this entry.