Timefactors · Microbrand · United Kingdom

Timefactors Precista Military PRS-10 Sapphire

Ref. PRS-10 · In production · Field

Design reference: Precista G10 (British military issue, early 1980s)

Timefactors Precista Military PRS-10 Sapphire, black military dial with broad arrow and date at 3, on grey NATO strap
Photo: Timefactors
  • Timefactors Precista Military PRS-10 Sapphire on grey NATO strap
  • Caseback of the Timefactors Precista Military PRS-10 Sapphire
From $300
  • Ronda 715
  • 37.1 mm × 11.2 mm
  • Sapphire crystal
  • 100 m water resistance

Movement

Caliber
Ronda 715
Type
Quartz
Tier
Mid
Complications
Date
Frequency
n/a
Power reserve
n/a
Hacking
n/a
Accuracy (factory)
-10 / +20 s/month
Modifications
715Li long-life version with a CR2016 lithium cell (10-year battery life, per Timefactors)

Case

Diameter
37.1 mm
Lug to lug
42 mm
Thickness
11.2 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
100 m
Crown
Screw-down
Case back
—
Bezel
—
Finishing
Bead-blasted, drilled lugs

Crystal & dial

Crystal
Sapphire
Shape
Box
Anti-reflective
—
Lume
Super-LumiNova C3 X1

Bracelet

Bracelet
Not offered

Straps

Strap 1
NATO, Grey NATO strap

Weight

Head only
49 g
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
All—Msrp225 GBPincl. VAT$3002026-10-24link

About this entry

87% of key specs known. Missing: hardening, AR coating.

Fourth PRS-10, in the style of the military-issue Precista G10 of the early 1980s, allocated NATO stock number 6645-99-226-5490. Upgrades over the original G10s listed by Timefactors: Ronda 715Li with 10-year battery, screw-down crown, screw back, double-domed (box) sapphire, 20mm lugs (was 19mm), Super-LumiNova X1-C3. Product page: 316L bead-blasted steel, "39.1mm across including crown, 37.1mm top to bottom" (no crown-less width is given; the 37.1mm top-to-bottom case measurement is recorded as the diameter of the round case), 42mm lug-to-lug, 11.2mm to the top of the crystal, anti-magnetic to 4,800 A/m, 100m, 49g without strap, drilled lugs; semi-matte black dial with X1-C3 hour dots and triangle, polished silvered hands with C3, date at 3. The movement is linked to the Ronda 715 file; the 715Li is its long-life lithium-cell version (Ronda's site sits behind a bot check, so no separate factory sheet was read). Swiss Made movement, made in Hong Kong. Available on 2026-10-25.

Last verified: 2026-10-25. Edit or correct this entry.

Sources