About the Workshop
Work Done Honestly, Kept as a Record
Siam is a Bangkok workshop focused on mechanical watch care — service, repair, and restoration handled carefully and with full transparency.
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How Siam Came to Be
Siam began as a small bench operation on Ratchadamri Road — a watchmaker working alone, taking on pieces that others had passed over or returned without resolution. The name comes from the old name for Thailand, chosen as a quiet reminder that some things are worth keeping in their original form.
Over time, the workshop grew to include a small team, but the working approach did not change. Each watch that arrives is treated as a record to be kept — an intake note, an inspection account, and a service log that stays with the piece and is shared with its owner. Nothing is done in the background.
The workshop does not rush. Bangkok is a city with a great deal of movement, but good mechanical watchwork has its own pace. A mainspring cleaned too quickly, or a balance regulated under time pressure, is not properly serviced. We set realistic timelines and communicate them plainly.
We focus on mechanical movements — manual and automatic — with a particular care for older and valued pieces that deserve thoughtful handling rather than a quick turnaround. If a watch has a story, we try to send it back with that story intact.
Our Focus
Mechanical watch service and restoration — done carefully, recorded openly, and discussed with the owner at every step that involves a decision.
Our Values
- Plain communication over technical jargon
- No work carried out without agreement
- Realistic timelines, communicated at intake
- Respect for the original condition of each piece
Where We Are
224 Ratchadamri Road, Lumphini, Bangkok 10330 — accessible by BTS (Ratchadamri Station), open Monday–Friday 10:00–18:00, Saturday 10:00–16:00.
The People
Who Works Here
Kasem Wongsakul
Senior Watchmaker
Over two decades working with Swiss and Japanese movements. Leads all full service and restoration work, and carries out intake assessments for complex pieces.
Nattaya Arunrat
Workshop Assistant
Handles intake documentation, client communication, and parts sourcing. Keeps the workshop records current and ensures every piece is tracked from drop-off to collection.
Praphas Thongsuk
Restoration Specialist
Focuses on dial and case conservation for older pieces. Works patiently with original surfaces and finishes, consulting closely with owners before any material intervention.
How We Work
Workshop Standards
Correct Lubricants
We use manufacturer-grade watchmaking oils appropriate to each movement type. Lubricant selection follows the movement's design — not a single product applied across all work.
Written Service Record
Every watch leaving the workshop is accompanied by a written service record — what was found, what was done, and what was observed. This goes with the watch, not into a filing cabinet.
Timing Checked Across Positions
After service, movements are tested across multiple positions over a full winding cycle. Results are recorded and shared — not just confirmed internally.
Water Resistance Check
Where appropriate and requested, case integrity is checked after seal replacement. Results and any limitations are noted clearly — we do not make assumptions about water resistance ratings.
Originality Respected
For restoration work, the original finish and character of a piece takes priority. We do not refinish, re-plate, or polish unless specifically requested, and we advise against changes that would reduce historical integrity.
Secure Handling
Pieces are stored securely when not being worked on. We maintain a clear intake log and do not allow watches to pass between staff without a record. Every piece is traceable at any point during its time with us.
Approach & Expertise
Mechanical Watch Care in Bangkok
Mechanical watches — particularly older Swiss and Japanese movements — require periodic care to remain accurate and to avoid wear that accumulates from running on degraded lubricants. A service performed well can extend the working life of a movement considerably, and a service record kept over time becomes a useful reference for future work.
Siam's approach draws on the tradition of the watchmaker's service ledger: a clear account of work done, parts noted, and observations recorded. This is not a formal affectation — it is simply a useful way of working. When a watch returns some years later, the record of previous work helps inform what is needed next.
Bangkok's climate — warm and at times humid — can affect mechanical movements over time, particularly seal integrity and lubrication stability. Watches worn regularly in this environment may benefit from slightly shorter service intervals than those recommended for temperate climates. We are glad to discuss this at intake for any watch brought in.
We carry out work on watches across a wide range of manufacturers and movement types. If you have a piece that has not been serviced for some time, or one that has developed an issue, a first step is simply to bring it in for an inspection. There is no obligation beyond the inspection charge, and you will receive a plain account of what we find.
Take the First Step
Bring Your Watch in for an Inspection
An inspection visit is the most straightforward way to understand what your watch needs. We will look at it, take notes, and give you a clear account — no obligation to proceed further.
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