Which is cheaper, the Sinn 105 St Sa UTC or the Hemel HD24 Automatic?

At MSRP the Hemel HD24 Automatic is the cheaper of the two at $300, against $1,998 for the Sinn 105 St Sa UTC — a $1,698 gap before any retailer discounting.

Which is bigger, the Sinn 105 St Sa UTC or the Hemel HD24 Automatic?

The Sinn 105 St Sa UTC wears larger at 41mm versus 40mm for the Hemel HD24 Automatic — a 1mm difference across the dial.

Which has a longer power reserve, the Sinn 105 St Sa UTC or the Hemel HD24 Automatic?

The Hemel HD24 Automatic carries a 40-hour power reserve against 38 hours on the Sinn 105 St Sa UTC.

What movement does the Sinn 105 St Sa UTC run compared to the Hemel HD24 Automatic?

Both watches run automatic movements — the Sinn 105 St Sa UTC uses the SW 330-2 and the Hemel HD24 Automatic uses the Seiko NH38A.

Side by side

Sinn 105 St Sa UTCvsHemel HD24 Automatic

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

Sinn 105 St Sa UTC

105 St Sa UTC

MSRP $1,998

Hemel HD24 Automatic

the-gallant

MSRP $300

At a glance

17 of 29 specs differ

Diameter

105 St Sa UTC41mm

HD24 Automatic40mm

Power Reserve

105 St Sa UTC38h

HD24 Automatic40h

Water Resistance

105 St Sa UTC200m

HD24 Automatic200m

MSRP

105 St Sa UTC$1,998

HD24 Automatic$300

Full specifications

Case

7 specs

Crystal & Dial

6 specs

Crystal

Sapphire

Domed Sapphire

Crystal Shape

—

Flat

AR Coating

Underside

Inner

Dial Color

Black

Gallant USAF Edition

Indices

—

Applied

Lume

Luminescent

None

Movement

3 specs

Caliber

SW 330-2

Seiko NH38A

Power Reserve

38h

40h

Complications

Date, GMT

None

Pricing

1 specs

MSRP

$1,998

$300

Follow this matchup

Get a note when Sinn 105 St Sa UTC vs Hemel HD24 Automatic gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Marathonmicro

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsHemel HD24 Automatic Hemel HD24 AutomaticvsMarathon Jeep Rubicon GSAR Hemel HD24 AutomaticvsMarathon GSAR (Government Search & Rescue) Diver's Automatic Bremont Supermarine 300MvsHemel HD24 Automatic Sinn 105 St Sa UTCvsVaer D5 Pacific Anacapa Auto Sinn 105 St Sa UTCvsYema Diver

Edit this comparison Add another watch Explore more 39–42mm watches

Sinn 105 St Sa UTCvsHemel HD24 Automatic

At a glance

Full specifications

Follow this matchup

More watches worth a look

OSAR-D (Original SAR with Date) Automatic 41mm

D5 Pacific Anacapa Auto

Jeep Rubicon GSAR

Diver

Sea-Hunter Dive Watch

Supermarine 300M

YEMA x Alain Silberstein Limited Edition

Broadsword

People also compared