Baltic ScalegraphvsSeiko Prospex SPEEDTIMER Mechanical

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Baltic Scalegraph at true scale

Scalegraph

Seiko Prospex SPEEDTIMER Mechanical at true scale

Prospex SPEEDTIMER Mechanical

Diameter

39.5mm

39.5mm

Lug-to-Lug

47mm

44.5mm

lowest

Thickness

14.1mm

12mm

lowest

Water Resistance

100m

200m

highest

Power Reserve

63h

72h

highest

MSRP

$1,766

$995

lowest

Movement

Sellita SW510

Seiko 6R55

Case

3 specs
Thickness
14.1mm
12mm
Lug-to-Lug
47mm
44.5mm
Water Resistance
100m
200m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
Yes
Anti-reflective coating on inner surface
Dial Color
Blue
n/a
Lume
BGW9
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW510
Seiko 6R55
Type
Manual
Automatic
Power Reserve
63h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,766
$995
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Reviews

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

Baltic Scalegraph

Owners and reviewers widely praise the Baltic Scalegraph for its compelling vintage styling and excellent value at its price point, with its 39.5mm case offering a slim and compact feel. The applied indices are a standout design element, though legibility can occasionally be a challenge due to polished surfaces. The manual-wind Sellita SW510-M movement provides a power reserve of approximately 60-63 hours. One owner reported bezel marker misalignment, which the brand stated was intentional, contradicting expectations. The screw-down pushers and 100m water resistance enhance its sports chronograph feel. Overall, owners and reviewers rate the Baltic Scalegraph highly for its vintage charm combined with modern wearability and capability at the price.

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is widely praised for its comfortable 39.5mm case size and appealing matte silver-white dial with LumiBrite indices. Owners find the watch visually attractive and comfortable for daily wear, with the 72-hour power reserve of the 6R55 automatic movement noted as a strength. Some users appreciate the chronograph function for everyday tasks, while others acknowledge it is rarely used by most purchasers. The watch features a countdown bezel and 20 bar water resistance. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its wearability and practical power reserve.

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