TC-0118
Chronograph
Series 01
Field Chrono
The core reference: column-wheel chronograph, ice-blue dial and a case that sits flat under a cuff.
Case
40 mm
Rate
+2 s/day
Rated
200 m
Biel/Bienne · 47.1368° N
Build TC-0118
Release 01 / 27
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Tachyon builds watches on the border between jewellery and instrument.
Every watch leaves with its own timing certificate, regulated in six positions. Calibre 01 was built for people who time things that matter — where a second is a measurement, not a mood.
System
Calibre 01
Models
04
Release
01 / 27
Status
Allocating
Calibre 01 — Field Line
Four references, one movement. Each watch is issued with its own serial number and a measured rate — nothing on it is decoration.
TC-0124
Three-hand
Series 01
Field Time
Time only, nothing else. Thinner case, longer power reserve, the same movement architecture.
Case
38 mm
Reserve
72 h
Rated
100 m
TC-0131
Night
Series 01
Night Chrono
Full lume dial, blackened steel and a chronograph you can read in a car park at 2 am.
Case
40 mm
Lume
8 h visible
Rated
200 m
TC-0140
Strap
Series 01
Rally Strap
Perforated calfskin with a quick-release bar. Fits every Calibre 01 reference without tools.
Width
20 mm
Change
< 10 s
Rated
Daily
Read the movement
Three systems sit under the caseback. The markers show what each part does — nothing in it is there to look expensive.
Loupe / Inspect
2.4× optical
Column wheel
7 columns · steel
Balance
4 Hz · free-sprung
Barrel
72 h · single
Movement
Calibre T-01 · 27 jewels
Case
316L steel · brushed
Crystal
Sapphire · AR both sides
04
Field test
Six positions, sixty days
Calibre 01 was worn, not photographed, by twelve testers for sixty days. Cycling, desk work, a rally in the Jura. What follows is what survived.
Test period
60 days
Positions
6
Testers
12
Rate deviation
+1.8 s/day
Fig. 04 — Biel · 06:10 CET
Field Chrono — TC-0118
Issued specification for the chronograph reference. Every value below is measured, not estimated.
Calibre T-01 · automatic · column wheel
28,800 vph (4 Hz)
72 hours
−2 / +4 s per day (6 positions)
316L steel · 40 × 12.9 mm
Sapphire · double AR
200 m · screw-down crown
92 g head only
Every 5 years · Biel workshop
We did not want another watch that looks precise. We wanted one that is precise after five years.
Lena Brunner
Founder · Biel/Bienne
Tachyon started at a bench in Biel with a lathe, a timing machine and a disagreement about what a chronograph owes its owner. Nothing has been outsourced since.
Fig. 06 — Atelier
Notes from the test
Short entries written during the wear test. No conclusions, just what happened.
Atelier · 07:30 CET
Rate is not accuracy
A watch can run fast and be honest about it. We regulate for consistency first, then for the number.
Jura · 14:20 CET
Pushers in gloves
Rally drivers start chronographs with gloves on. We made the pushers longer and the clicks louder.
Studio · 09:05 CET
Nothing here is decorative
Every line on the dial is a scale, a marker or lume. If a detail could not explain itself, it did not ship.
Allocation — Calibre 01
Assembled once, in one batch.
250 watches, assembled in Biel, released 01 / 27. Allocation closes when the batch is assigned — there is no restock and no second dial.
250 watches
Ships 01 / 27
Made in Switzerland