Which is cheaper, the AVI-8 Spitfire Lock Chronograph or the Grand Seiko SBGX355?

At MSRP the AVI-8 Spitfire Lock Chronograph is the cheaper of the two at $260, against $4,100 for the Grand Seiko SBGX355 — a $3,840 gap before any retailer discounting.

Which is bigger, the AVI-8 Spitfire Lock Chronograph or the Grand Seiko SBGX355?

The AVI-8 Spitfire Lock Chronograph wears larger at 42mm versus 37mm for the Grand Seiko SBGX355 — a 5mm difference across the dial.

Which has better water resistance, the AVI-8 Spitfire Lock Chronograph or the Grand Seiko SBGX355?

The Grand Seiko SBGX355 is rated to 100m versus 50m for the AVI-8 Spitfire Lock Chronograph.

Side by side

AVI-8 Spitfire Lock ChronographvsGrand Seiko SBGX355

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

AVI-8 Spitfire Lock Chronograph

spitfire-lock-chronograph-midnight-oak-av-4089-01

MSRP $260

Grand Seiko SBGX355

sbgx355g

MSRP $4,100

At a glance

12 of 29 specs differ

Diameter

Spitfire Lock Chronograph42mm

SBGX35537mm

Power Reserve

Spitfire Lock Chronograph40h

SBGX35540h

Water Resistance

Spitfire Lock Chronograph50m

SBGX355100m

MSRP

Spitfire Lock Chronograph$260

SBGX355$4,100

Full specifications

Case

7 specs

Crystal & Dial

3 specs

Crystal

Mineral

Sapphire

AR Coating

Inner

Yes

Dial Color

MIDNIGHT OAK

Black

Movement

1 specs

Caliber

—

9F62

Pricing

1 specs

MSRP

$260

$4,100

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

AVI-8 Spitfire Lock Chronograph

Owners widely report AVI-8 watches offer a compelling design and are decently well made for the price. The AVI-8 Spitfire Lock Chronograph features a 42mm stainless steel case with curved lugs, a bi-compax meca-quartz movement, and a mineral crystal, with design elements inspired by Supermarine Spitfires. One owner notes that AVI-8 watches are "something different" and "decently well made," though not of "insane quality." On balance, owners and reviewers appreciate the AVI-8 Spitfire Lock Chronograph for its unique design and value proposition.

The Grand Seiko SBGX355 is widely praised for its beautiful dial, excellent finishing, and perfect 37mm size. Owners report unparalleled accuracy from the 9F62 quartz movement, rated to within 10 seconds per year. The high-intensity titanium case and 100m water resistance are noted features. Some consider the SBGX355 a "baby Snowflake" and a more accessible alternative to other models. Overall, owners and reviewers rate the Grand Seiko SBGX355 highly for its iconic Snowflake dial and exceptional quartz accuracy in a wearable 37mm case.

From video reviewers

The titanium case finishing is a significant strength. The deployant clasp is noted as prone to rattle. Reviewers disagree on the ideal case size for everyday wear.

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