Aera Instruments M-1 KronsvsD1 Milano D1 x Tetris

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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.

M-1 Krons

D1 x Tetris
Diameter
39mm
40mm
Lug-to-Lug
47.6mm
n/a
Thickness
13.1mm
n/a
Water Resistance
100m
highest
50m
Power Reserve
42h
n/a
MSRP
$1,800
$225
lowest
Movement
Sellita SW216-1
Manual
Case
6 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Aera Instruments M-1 Krons is noted for its modern, non-generic design and comfortable wearability, with reviewers highlighting the dial's unique color and excellent lume from Globolight numerals. One review mentions the hand-wound Sellita SW216-1 movement is specified for historical connection and is regulated to -/+7 seconds per day. Another review criticizes the use of a Sellita SW200-1 automatic movement with a ghost date position in no-date executions, and suggests the case could be closer to 40mm. On balance, reviewers appreciate the uncommon dial execution and hand-painted lume, though some find the case shape occasionally bulbous.
The D1 Milano x Tetris is praised for its excellent finishing and quality for its €270 price point, with one owner finding its "cel shaded" aesthetic visually appealing, making it pop while remaining understated. However, one owner questions the overall quality and value for the price. Overall, owners rate the D1 Milano x Tetris highly for its impressive finishing and unique visual appeal at its price.
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