A steel watch with a green dial floats on a dark backdrop. As you scroll it comes apart along one line into its crystal, bezel, hands, dial, movement, case and caseback, then goes back together.

Arbor Field 40 · Automatic · £2,150

Seven parts,nothing hidden.

A 40 mm steel case, a sunburst green dial and an automatic movement with 72 hours of reserve. Scroll, and it comes apart.

Choose a strap Specification

01
Crystal 2.0 mm sapphire
Flat sapphire, anti-reflective on the inside only, so the outside never scuffs to a haze.
02
Bezel Polished steel
A thin ring, 1.2 mm at its edge, so the dial reads as large as the case allows.
03
Hands Hand-polished
Sword hands cut from steel, hours and minutes only. No seconds hand, no date.
04
Dial Green sunburst
Brass, brushed out from the centre and lacquered green, with applied steel indices.
05
Movement 72-hour reserve
Calibre A1: automatic, 4 Hz, 25 jewels, with a gold-plated rotor you can watch through the back.
06
Case 40 × 11.4 mm
316L steel, brushed on the flanks and polished on the bevels. 47 mm lug to lug.
07
Caseback Sapphire window
Screwed down to 100 m, with a window onto the movement and the name engraved round it.

The bench

One watchmakersees it through.

Each Field 40 is assembled, regulated and cased by one person at one bench in Birmingham’s Jewellery Quarter, then tested in six positions over six days before it leaves.

Calibre A1 going into its case. The dial waits its turn.

Specification

Everything the dial leaves out.

Case: 40 mm316L steel, brushed on the flanks and polished on the bevels. 47 mm from lug to lug.
Thickness: 11.4 mmIncluding the flat 2.0 mm sapphire crystal, anti-reflective on the inside only.
Power reserve: 72 hoursCalibre A1, automatic. Off your wrist on Friday night, still running on Monday.
Water: 100 mA screwed caseback with a sapphire window. Swimming is fine; saunas are not.
Accuracy: −4/+6 sA day, regulated in six positions and checked over six days.