Which is cheaper, the Sheffield 1A 38 or the Sinn U18?

At MSRP the Sheffield 1A 38 is the cheaper of the two at $238, against $3,488 for the Sinn U18 — a $3,250 gap before any retailer discounting.

Which is bigger, the Sheffield 1A 38 or the Sinn U18?

The Sinn U18 wears larger at 44mm versus 38mm for the Sheffield 1A 38 — a 6mm difference across the dial.

Which has better water resistance, the Sheffield 1A 38 or the Sinn U18?

The Sinn U18 is rated to 2000m versus 200m for the Sheffield 1A 38.

What movement does the Sheffield 1A 38 run compared to the Sinn U18?

Both watches run automatic movements — the Sheffield 1A 38 uses the Seiko NH35 and the Sinn U18 uses the SW300-1.

Side by side

Sheffield 1A 38vsSinn U18

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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Sheffield 1A 38

1a-38-blue

MSRP $238

Sinn U18

U18

MSRP $3,488

At a glance

15 of 29 specs differ

Diameter

1A 3838mm

U1844mm

Power Reserve

1A 38—

U1842h

Water Resistance

1A 38200m

U182,000m

MSRP

1A 38$238

U18$3,488

Full specifications

Case

8 specs

Diameter

38mm

44mm

Thickness

12.8mm

15.5mm

Lug-to-Lug

46mm

—

Lug Width

20mm

22mm

Material

Stainless Steel

high-strength

Finish

Brushed and polished

—

Water Resistance

200m

2000m

Caseback

Solid

—

Crystal & Dial

4 specs

Crystal Shape

Flat

—

AR Coating

Inner

—

Dial Color

Blue

Black

Indices

Applied

—

Movement

2 specs

Caliber

Seiko NH35

SW300-1

Power Reserve

—

42h

Pricing

1 specs

MSRP

$238

$3,488

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Sheffield 1A 38vsSinn U18

At a glance

Full specifications

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