Back to the latest issue

New release review / Automatic winding

Sealander Yalos: slim SW300, 904L steel and a deliberate lack of lume

Watch passportSelect a specification for a plain-language explanation

Yalos pairs a COSC-certified Sellita SW300-1 b with a 9.9 mm case. Official reserve is a minimum of 50 hours and typically 56; neither hands nor markers carry luminous material.

Published 29 October 20264 min read
C63 Sealander Yalos Ice Blue
Photo: © Christopher Ward · Image source

The essentials first

In one minute

Case39 mm
CalibreSellita SW300-1 b COSC
Power reserveMinimum 50 hours; typically 56 hours

Why it is interesting

SW300 serves a slim case with certified accuracy. The textured dial brings Yalos closer to classic watchmaking.

Things to consider

There is no lume; 56 hours is typical reserve, while the guaranteed minimum is 50 hours.

Save modelCompare with other models

Christopher Ward · C63 Sealander Yalos Ice Blue

The model in detail

In Yalos, Christopher Ward removes luminous material and gives more space to dial texture. Ice Blue resembles fractured ice, but it is a stamped surface under translucent lacquer, not meteorite. Each dial receives three stamping operations before colouring. The new range appeared in coverage dated October 29, 2026; the official product page provides no separate original announcement day.

The changes also affect proportions: the 39 mm case is 9.9 mm thick and 45.4 mm lug-to-lug. It uses 904L steel, with a raised box sapphire at the front and no distinct projecting bezel. The result should appeal to those seeking an expansive view of the dial and a relatively slim profile. However, paper dimensions do not fully describe fit: the lugs and domed crystal remain part of its real volume.

Ice Blue on blue Vesuvio, shown on the wrist; this is not a claim of personal wear testing.Enlarge

Ice Blue on blue Vesuvio, shown on the wrist; this is not a claim of personal wear testing.

© Christopher Ward · Source

Behind the transparent back is the Sellita SW300-1 b COSC. Its 3.6 mm height helps achieve the slim case; frequency is 4 Hz, jewel count 25, and the stated tolerance is −4/+6 seconds per day. An important detail in the technical section is a minimum reserve of 50 hours and a typical 56, rather than an unconditional guarantee of 56. For rotation, that means approximately two days after full winding, but not an entire long weekend.

Reference C63-39C3H4-S00B0-VB on blue Vesuvio costs $1,815 on the official website in United States USD mode; bracelet configurations in the range cost $2,095. These must not be conflated as a single price for one SKU. Water resistance is 10 ATM, but the selected version’s suede strap does not thereby become an aquatic accessory. Polished hands catch ambient light; in complete darkness there is none to reflect, and the lack of lume will matter.

Sources

Christopher Ward — Yalos Ice Blue exact reference and specificationswww.christopherward.comChristopher Ward — Yalos range and configuration priceswww.christopherward.comOracle Time — Yalos coverage dated October 29, 2026oracleoftime.com · 29 October 2026