Bergeon 7971 Glass Pen

Product Description

The Bergeon 7971 is a fiberglass cleaning pen designed to remove stubborn dirt, oxides, and old adhesive residues from watch glasses, cases, and metal bracelet gaps. Its tip consists of extremely fine glass fibers that safely clean without scratching polished surfaces. This tool is an essential daily cleaning aid for watchmakers and enthusiasts.

Features & Function

Cleaning principle: The fiberglass tip physically removes stubborn dirt, old oil residues, and oxidation from the edges of watch glasses, case seams, and bracelet link gaps.

Non-abrasive: With proper use, the fiberglass hardness is safe for sapphire/mineral crystals, stainless steel, and precious metal surfaces without scratching.

Renewable tip: When the tip becomes dirty or dull, rotate the internal feed mechanism to extend fresh cleaning fibers, extending tool life.

Ergonomic design: Easy-to-hold body allows controlled force for delicate work.

Swiss made: Genuine Bergeon, brand new in original packaging, reliable quality.

Usage Instructions

Initial use: Turn the feed knob at the rear counter-clockwise 1-2 turns until the fiberglass tip extends about 2-3mm.

Cleaning operation: Gently touch the tip to the stained area and rub in small circles or back-and-forth motions. Do not press too hard; let the natural abrasive action of the fibers do the work.

During cleaning: If the tip becomes clogged with dirt, gently remove the dirty fibers with tweezers or fingernails, then turn the feed knob to expose fresh fibers.

Finishing: After cleaning, use a soft brush or air blower to remove any residual glass fiber dust, then wipe the crystal and case with a microfiber cloth.

Important Notes

⚠️ Glass fiber dust: Fine fiber particles may be generated during use, which can irritate skin or be inhaled. Operate in a well-ventilated area or use a vacuum; wash hands after use and avoid touching eyes.

⚠️ Not for coated surfaces: Do not use on watch glasses with anti-reflective (AR) coating to avoid damaging the coating.

⚠️ Avoid plastic/acrylic crystals: Use with caution on acrylic (plexiglass) crystals. Test on a hidden area first, as fibers may cause micro-scratches.

⚠️ Do not over-extend: Extend only 2-3mm of fiber. Too much fiber will break easily and reduce cleaning efficiency.

⚠️ Keep away from children: Fiberglass particles can cause skin irritation. Store out of reach of children.

Maintenance & Service Guide

Cleaning the pen body: Wipe the exterior with a dry cloth after use. Do not wash or soak in water.

Feed mechanism maintenance: If the knob becomes stiff to turn, apply one drop of watch oil (e.g., Moebius 9010) to the threads and rotate several times.

Refill replacement: When fibers can no longer be advanced or cleaning performance drops significantly, replace with a Bergeon 7972 refill.

Storage: Retract the tip fully into the pen body, cap if available, and store in a dry place to prevent fibers from absorbing moisture and becoming brittle.

FAQ

Q1: Can the Bergeon 7971 remove deep scratches from watch crystals?
A: No. This tool is designed for removing surface dirt, oxidation, and old adhesive residues. It is not a polisher. For deep scratches, use professional polishing compounds or replace the crystal.

Q2: How to remove the fine fiber residue left on the crystal after use?
A: Lightly brush the surface with a soft brush (e.g., nylon brush) or use a sticky dust tape, then wipe with a microfiber cloth. Do not rinse with water.

Q3: Will this pen scratch stainless steel cases?
A: With normal light pressure, it will not scratch stainless steel. However, avoid prolonged aggressive rubbing on brushed or polished surfaces to prevent micro-brush marks.

Q4: What if the tip extends too far?
A: Turn the rear knob clockwise to retract the fibers. If it cannot retract, carefully trim the excess with scissors and remove loose fibers with tweezers.

Q5: What is the difference between Bergeon 7971 and 7972?
A: 7971 is the complete cleaning pen (pen body with fiberglass spool). 7972 is the separate replacement fiber spool (consumable) for when the fibers in the 7971 are depleted.