Why Mainspring Works
What You Can Expect When a Piece Comes to This Bench
A set of working methods that are stated before work begins, not discovered afterwards.
← Back to HomeSix Things Owners Notice
Written Costs in Advance
Each line item of a proposed job is priced and presented before any work begins. There are no bundled fees and no discovery of additional costs at collection. The owner sees exactly what each element of the scope costs and chooses what to proceed with.
One Person, One Piece
The watchmaker who receives a piece at intake is the one who carries the work through to handover. There is no internal transfer between technicians. Questions about the work are answered by the person who did it.
Figures, Not Impressions
Reports state the timing machine reading in seconds per day, amplitude in degrees, beat error in milliseconds. Descriptions such as "running well" or "looks good" are not used in place of the numbers.
Parts Source Always Named
No component goes into a movement without its source being stated: manufacturer new, new old stock, or made in-house. The distinction matters to owners and to any future repairer who opens the movement years later.
Your Report Belongs to You
A diagnostic report is the property of the owner who commissioned it. It may be taken to another repairer, used for insurance purposes, or simply filed with the piece. No request or fee is needed to obtain it.
Inspection by Appointment
Owners of pieces in long-form service may arrange a visit to inspect the work in progress at any stage. The piece remains in the workshop; the owner comes to the bench. No prior service experience is required to understand what is shown.
The Expertise Behind the Bench
Mainspring Works was built on years of independent calibre study — not a single manufacturer's training programme. That breadth means the workshop handles movements from a range of origins and eras without the limitation of a marque-specific service model. Swiss lever, Japanese cylinder, English fusee, mid-century automatic: each receives the same systematic approach regardless of origin.
- Calibre identification across multiple national traditions
- Pivot measurement against original factory tolerance documents
- Bridge and plate finishing where original grain has been lost
- In-house fabrication of unavailable components
Process Transparency
The intake script used at the counter is the same for every piece: known history, previous service, current symptoms. The diagnostic report then produces a photographic and numerical record that the owner can read without specialist knowledge. The cost plan that follows separates each proposed action so that scope and value are visible together, not bundled into a single figure.
- Standardised intake questions, answered at the counter
- Diagnostic report issued in 3–5 working days
- Cost plan with line-by-line breakdown before commitment
- Owner may accept partial scope without pressure
Customer Service Model
The workshop does not use a customer service representative as an intermediary between the owner and the watchmaker. When a question about a piece arises, it is answered by the person working on it. Status updates are sent when a defined stage is reached — intake confirmed, diagnostic complete, estimate sent, work complete — not on request.
- Direct communication with the working watchmaker
- Stage-based updates without requiring the owner to chase
- Inspection visits available by arrangement
Value and Pricing
The diagnostic assessment is a fixed fee of RM 470. It is not deducted from a subsequent repair cost — it is a standalone product that delivers a document the owner can use independently. Water resistance work and full overhaul are priced from stated figures; the final cost is confirmed in the line-item estimate before work proceeds.
- Diagnostic: RM 470 stated, standalone
- Water resistance from RM 1,450 confirmed before work
- Long-form overhaul from RM 4,700 with full dossier
- No open billing — final cost agreed in writing first
Compared to the Alternatives
| Feature | Mainspring Works | Typical Multi-Tech Workshop | Manufacturer Service Centre |
|---|---|---|---|
| Written itemised estimate before work | Varies | Often bundled | |
| Single watchmaker throughout | |||
| Numerical performance figures in report | Varies | ||
| Parts provenance stated per component | OEM only | ||
| Report belongs to owner, portable | Varies | ||
| In-progress inspection by appointment | |||
| Vintage and multi-era calibre coverage | Varies | Marque-limited | |
| Bound calibre dossier available |
What Is Not Offered Elsewhere
The Bound Calibre Dossier
Produced for the long-form overhaul service, this is a physical document — not a PDF — containing macro photography of every component, the watchmaker's notes on condition, measurement records against factory tolerances, and the 14-day rate log. Designed to sit alongside the piece as a permanent record and to satisfy provenance requirements for auction or collection transfer.
Pre-Work Vacuum Test on Water Resistance
Before any seal replacement begins, a vacuum test locates the specific leak path — crown tube, crystal, caseback, or pushers. The test result is included in the service record. The post-work pressure certificate states the measured hold figure, not the case's marked depth rating. Owners receive both documents.
In-House Component Fabrication
Where a replacement part cannot be sourced — a common situation with movements produced before 1980 — the option of in-house fabrication is offered rather than refusal of the job. The fabricated component is identified as such in the service record. Cost and scope are agreed in advance.
Portable Second-Opinion Report
The RM 470 diagnostic assessment is designed to be taken to another repairer. It records the current condition of the movement in measured values and photographs. Owners who have received a quote elsewhere and want an independent reading of the same piece are an intended use case for this service.
Workshop in Numbers
340+
Pieces assessed
since opening
97%
Estimates accepted
within stated scope
6+
Years of independent
calibre study
12
Calibre families
documented to date
Ready to Bring a Piece In?
Start with a diagnostic assessment. Three to five working days, a written report, and a cost plan for anything worth doing. No commitment beyond that.
Request an Assessment