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The Bergeon 7662 is a professional key tool designed for opening waterproof watch case backs, featuring a polyamide PA12 shell for lightweight durability. Its interchangeable hardened steel jaws provide an opening diameter range from 16 mm to 52 mm, fitting most screw‑down case backs. The tool comes with one set of two jaws (ref. 2819‑B), with additional jaw sets (ref. 2819‑A, 2819‑C, 2819‑D) available separately for different watch brands and case back patterns. An ideal tool for watchmakers to safely open waterproof watches from brands such as Rolex, Omega, and others.
Polyamide PA12 Shell – Lightweight, high‑impact resistant, insulating and non‑slip.
Interchangeable Hardened Steel Jaws – Durable and wear‑resistant; optional jaw sets for different case back patterns.
16–52 mm Opening Range – Fits the vast majority of screw‑down case backs.
Basic Jaws Included – Comes with one set of 2819‑B jaws (2 pieces) ready to use.
Swiss Bergeon Original – Professional quality, precise and reliable.
| Parameter | Details |
|---|---|
| Model | Bergeon 7662 |
| Type | Waterproof watch case back opener |
| Shell Material | Polyamide PA12 |
| Opening Diameter Range | 16 mm – 52 mm |
| Jaw Material | Hardened steel (interchangeable) |
| Included Jaws | 1 set of 2819‑B (2 pieces) |
| Optional Jaws | 2819‑A / 2819‑C / 2819‑D |
| Origin | Switzerland |
Opening screw‑down case backs from Rolex, Omega, Longines, and other waterproof watches.
Accessing the movement for battery replacement, service, or repair.
Compatible with various case back patterns by using different jaw sets (e.g., Rolex‑specific, Omega‑specific patterns).
1. Is this a genuine Bergeon tool?
Yes. It is a Swiss Bergeon factory‑original model 7662, brand new.
2. How do I choose the correct jaw set?
2819‑B is a general set for most case backs. 2819‑A is for specific Rolex patterns; 2819‑C and 2819‑D are for Omega and others. Consult the seller based on your case back pattern.
3. Is the 16‑52 mm opening range sufficient?
It covers most watch case backs, including men‘s and ladies’ sizes. Very large pocket watch backs may require a larger tool.
4. How do I change the jaws?
Use the supplied screws or quick‑release mechanism to remove the old jaws, insert the new set, and tighten. Refer to the Bergeon manual.
5. How do I maintain the tool?
Keep the jaws clean and free of oil residue. Inspect for wear periodically. Wipe the shell with a soft cloth.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
Trusted by watchmakers worldwide.
Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.
