PIONEER Preventor HD12™ black, 39 mm
$1.265
incl. VAT
on a leather strap
Size chart for bracelets
To determine your strap/bracelet length, you can either measure your wrist circumference and determine your bracelet length in the table or use our templates, which you can download below.
Please find our templates for download here:
Instructions: Print out the document and make sure that no page scaling is preset. Cut out the template along the red dotted line. Place the watch on your wrist and pull the strap through the cut slit. Make sure that the template is not too tight on your wrist and that you have a little space between your fingers.
Please note that leather underbands result in a longer strap length.
Strap lengths:
417 ES/415 ES/PIONEER: S = (10.5 / 6.5 cm) M = (11.5 / 7.5 cm) L = (12.5 / 9.0 cm)
AQUASPHERE(FLY NAVY Aerosphere rubber strap: M = (10.0/8.0 cm) L = (11.5/9.5 cm)
PRIMUS: S = (9.5/7.5 cm) M = (10.5/8.5 cm) L = (12.0/10.0 cm)
RACEMASTER: S= (10.4/6.4 cm) M= (11.4/7.4 cm) L= (12.4/8.4 cm)
| Model | Lug width | Wrist circumference S-band | Wrist circumference M-band | Wrist circumference L-band |
| General recommendation, regardless of model and band | 13.0 cm - 16.0 cm | 16.5 cm - 18.5 cm | 19.0 cm - 22.0 cm | |
| PIONEER Silva | 20 mm | 13.0 cm - 17.0 cm | 15.0 cm - 21.0 cm | 18.0 cm - 23.5 cm |
| 417 ES 1954 (with leather strap) | 20 mm | 13.0 cm - 17.0 cm | 14.0 cm - 20.0 cm | 17.0 cm - 22.0 cm |
| PIONEER Mk I, Mk II, TachyTele, Preventor9, 415 ES | 20 mm | 13.0 cm - 17.0 cm | 14.0 cm - 20.5 cm | 17.0 cm - 22.5 cm |
| Preventor HD12™ | 20 mm | 13.0 cm - 17.0 cm | 14.0 cm - 20.0 cm | 17.0 cm - 22.0 cm |
| 417 ES (with bund strap) | 21 mm | 13.0 cm - 19.0 cm | 14.0 cm - 20.0 cm | 18.0 cm - 23.0 cm |
| PIONEER TwinControl, MonoControl | 21 mm | 13.0 cm - 19.0 cm | 15.5 cm - 21.5 cm | 19.0 cm - 23.5 cm |
| PIONEER One | 21 mm | 13.0 cm - 19.0 cm | 15.5 cm - 20.5 cm | 18.0 cm - 23.5 cm |
| PIONEER TwinDicator, MonoScope | 23 mm | 13.0 cm - 19.0 cm | 15.5 cm - 21.5 cm | 18.0 cm - 24.0 cm |
| AQUASPHERE/FLY NAVY Aerosphere rubber strap | 20 mm | n/a | 15.5 cm - 19.5 cm | 17.5 cm - 22.0 cm |
| RACEMASTER | 23 mm | 13.0 cm - 18.0 cm | 16.5 cm - 21.5 cm | 18.5 cm - 23.5 cm |
| PRIMUS leather | 24 mm | 13.0 cm - 17.5 cm | 16.0 cm - 20.0 cm | 18.0 cm - 22.5 cm |
| PRIMUS rubber | 24 mm | n/a | 14.0 cm - 18.5 cm | 17.5 cm - 21.5 cm |
| PRIMUS Textile | 24 mm | n/a | 14.5 cm - 19.5 cm | 17.5 cm - 21.5 cm |
YOUR DAILY COMPANION
Preventor HD12™
AVAILABLE IN BLUE OR BLACK
TIMELESS HANHART DESIGN
The new Preventor HD12™ was co-developed by TGV from ``The Urban Gentry``.


DEVELOPED FOR HEAVY USE
HD12™ STEEL
Hanhart combines two high-tech processes in the elaborate, multi-stage production of its HD12™ cases in order to preserve the fine details in the appearance of the case in addition to optimum scratch resistance. As a result, the new Preventor HD12™ not only has an enormous surface hardness, but also brushed, matt and glossy surfaces.
In a first step, large quantities of carbon are diffused into the stainless steel in a surface hardening process. This creates a gradual transition from the hard surface to the soft core. This process offers an enormous advantage over a pure coating, as it prevents brittleness. A transparent hard coating (PVD) is then applied to provide additional protection.
With this process, the HD12™ steel achieves an impressive surface hardness of up to 1200 HV (Vickers hardness), which makes the watch case many times more resistant to scratches. In contrast, conventional 316L steel has a surface hardness of around 220 HV.
NEW IN THE PIONEER COLLECTION
Preventor HD12™
DARKNESS? NO PROBLEM
SUPER LUMINOVA®
HIGH QUALITY CALFSKIN OR STEEL STRAP
OPTIMUM WEARING COMFORT

CASE
DIMENSIONS
- Diameter: 39 mm
- Height: 10.50 mm
- Lug to Lug: 46 mm
MATERIAL
- Satin-finished/polished, hardened HD12™ steel
BEZEL
- Smooth bezel
- Screw-down, polished crown with historic Hanhart “h”
GLASS
- Convex, internally anti-reflective sapphire crystal
CASE BACK
- Screwed case back
WATER RESISTANCE
- Up to 15 bar/15 ATM according to DIN 8310
MOVEMENT
CALIBER
- Automatic winding mechanism
- Basis: Soprod SOP P024
- 28,800 A/h (4 Hz)
- 25 jewels
POWER RESERVE
- 38 hours after full winding
FUNCTIONS
- TOP version
- Genuine three-hand movement without date display
- Glucydur balance
- Incabloc® double cone
DIAL
DIAL
- Historical Hanhart logo
- Black dial (matt)
NUMBERS
- Super-LumiNova® C1 coated
HANDS
- Super-LumiNova® C1 coated
STRAP
STRAP
- Calfskin with Alcantara on the inside
- Lug width 20 mm
COLORS
- Black
- Dark brown
- Light brown
BUCKLE
- Pin buckle
