An electronic digital caliper for precise measurements of watch cases, lugs and bracelets.
Product overview
This watchmaker tool is a digital caliper with millimetre and inch readouts, essential for measuring case diameter, lug width, bracelet thickness and crystal sizes. The LCD shows readings to 0.01 mm precision and the zero button lets you take comparative measurements quickly. From sizing a NATO strap on a Seiko 5 to checking the crystal of an Omega Speedmaster, accurate measurement avoids ordering the wrong replacement parts. Owning the proper instruments is the first step toward enjoyable, repeatable watch servicing on the bench at home or in a professional workshop. This watchmaker tool belongs to a broader range of horological accessories trusted by amateur restorers, vintage watch collectors and professional repair benches alike. Every stage of a watch service from case-back removal, gasket inspection, movement cleaning, bracelet sizing to crystal pressing benefits from dedicated, correctly sized instruments. Investing in the right tool prevents costly scratches on polished bezels, broken lugs, sheared screw heads or damaged spring bars. Whether you service a Seiko 5, an Omega Speedmaster, a Rolex Submariner clone or a Bergeon-compatible reference, working with proper hand tools dramatically reduces the risk of damaging your timepiece. Many enthusiasts start with battery changes on quartz watches and gradually move to bracelet adjustments, then case-back openings, before attempting movement work. Each phase needs its own specialised instruments, and assembling a full kit over time is more economical than buying a closed boxed set. Always work on a clean, well-lit bench, ideally on a soft mat that catches small parts, and keep a magnetic tray nearby for screws and pins. Lubricants like Moebius oils, drying papers and a dedicated dust blower complete the typical workshop. Combine this item with a watch holder, a 10x loupe and a fine screwdriver set ranging from 0.6 mm to 2.0 mm for a fully functional repair station. The hardness of working surfaces is calibrated around 55 to 60 HRC on most professional benches, ensuring repeatable results without marking the workpiece. Used carefully and stored away from humidity, this watchmaker tool will support hundreds of services without significant wear, and will pay for itself after only a few interventions on quartz or mechanical calibres. The bench is the heart of any watch service: a stable holder, focused light, soft work mat and tidy parts tray make every operation safer and faster. Adding this watchmaker tool to that environment turns a casual workspace into a small atelier capable of professional results on quartz and mechanical calibres alike. The bench is the heart of any watch service: a stable holder, focused light, soft work mat and tidy parts tray make every operation safer and faster. Adding this watchmaker tool to that environment turns a casual workspace into a small atelier capable of professional results on quartz and mechanical calibres alike.
Technical specifications
- Stainless steel jaws and rod
- Digital LCD with mm / inch toggle
- Resolution 0.01 mm / 0.0005 inch
- Measurement range 0 to 150 mm
- Zero and unit buttons
- Battery powered (LR44 supplied)
When to use it
Use the caliper to measure case diameters, lug-to-lug distance, lug width for strap selection, crystal diameter and bracelet thickness before ordering parts.
How to use
- Switch on with the power button
- Close the jaws and press zero
- Open the jaws around the workpiece
- Read the value on the LCD
- Press mm/inch to change units
- Close the caliper and switch off after use
Quality & origin
Manufactured from stainless steel with hardened jaws. Supplied in a protective case with a battery installed. Suitable for daily workshop use.
FAQ
Accurate for lug width?
Yes, the inner jaws measure lug width to 0.01 mm precision.
How long does the battery last?
Typically several months of intermittent workshop use.
Can I switch to inches?
Yes, the unit button toggles between mm and inch.
