Side by side

Serica Ref. 8315 Travel ChronometervsTornek-Rayville Blakjak Time-elapse

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

Ref. 8315 Travel Chronometer
SericaRef. 8315 Travel Chronometer
MSRP $2,479
Blakjak Time-elapse
Tornek-RayvilleBlakjak Time-elapse
MSRP $895

At a glance

10 of 29 specs differ
Diameter
Ref. 8315 Travel Chronometer39mm
Blakjak Time-elapse42.5mm
Power Reserve
Ref. 8315 Travel Chronometer42h
Blakjak Time-elapse42h
Water Resistance
Ref. 8315 Travel Chronometer200m
Blakjak Time-elapse200m
MSRP
Ref. 8315 Travel Chronometer$2,479
Blakjak Time-elapse$895

Full specifications

Case

5 specs
Category
GMT
Diver
Diameter
39mm
42.5mm
Thickness
12.3mm
13.2mm
Lug-to-Lug
46.5mm
49mm
Lug Width
20mm
22mm

Crystal & Dial

2 specs
Dial Color
GMT - Enamel Black
Black
Lume
Super-LumiNova
Superluminova

Movement

2 specs
Caliber
SOPROD C125 COSC
SII NH36
Complications
GMT, COSC
None

Pricing

1 specs
MSRP
$2,479
$895

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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.

Serica Ref. 8315 Travel Chronometer

Serica Ref. 8315 Travel Chronometer owners and reviewers praise its neo-vintage aesthetic, comfortable 39mm size, and unique day/night bezel design. Some find the lack of a date function a drawback, and the mirrored 12-hour bezel with AM/PM text is considered less practical than a traditional 24-hour bezel for time zone reading, with the lollipop-style 24-hour hand and asymmetrical bezel design also noted as potentially confusing. The watch is powered by a COSC-certified Soprod C125 movement with a 40-hour power reserve. One owner noted import duties and that the strap's aggressive taper required using the last hole for a proper fit. On balance, Serica Ref. 8315 Travel Chronometer is appreciated for its distinctive design and wearability, though its GMT functionality and bezel design are points of contention for some.

Tornek-Rayville Blakjak Time-elapse

The Tornek-Rayville Blakjak Time-elapse is a rugged, dive-capable field watch, an evolution of a 1990s military concept. It features a 42.5mm stainless steel case, a sapphire crystal, and a Seiko NH36 automatic movement with a 40-hour power reserve. The dial is busy but functional, and the watch features Super-LumiNova BGW9. On balance, reviewers note the Tornek-Rayville Blakjak Time-elapse is a modernized military watch with robust dive capabilities.

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