Side by side

Baltic Prismic StonevsFormex Reef GMT

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

Prismic Stone
BalticPrismic Stone
MSRP $1,404
Reef GMT
FormexReef GMT
MSRP $2,235

At a glance

13 of 29 specs differ
Diameter
Prismic Stone36mm
Reef GMT42mm
Power Reserve
Prismic Stone50h
Reef GMT56h
Water Resistance
Prismic Stone30m
Reef GMT300m
MSRP
Prismic Stone$1,404
Reef GMT$2,235

Full specifications

Case

6 specs
Category
Dress
GMT
Diameter
36mm
42mm
Thickness
9.2mm
11.4mm
Lug-to-Lug
44mm
47mm
Lug Width
20mm
22mm
Water Resistance
30m
300m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Bloodstone
Black
Lume
None
Super-LumiNova

Movement

3 specs
Caliber
La Joux-Perret D100
Sellita SW330-2
Type
Manual
Automatic
Power Reserve
50h
56h

Pricing

1 specs
MSRP
$1,404
$2,235

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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.

Baltic Prismic Stone

Owners and reviewers widely praise the Baltic Prismic Stone for its striking and unique natural stone dials, with specific mentions of the bloodstone and red agate variants being highlights. The watch is noted for its refined, retro dress watch aesthetic, featuring a well-finished 36mm bi-metal case combining stainless steel and titanium, and a slim profile measuring 9.2mm or 9.5mm thick. The hand-wound movement, either an ETA Peseux 7001 or a La Joux-Perret D100, is generally seen as reliable, offering a 42-hour or 50-hour power reserve respectively. However, some owners find the collection overpriced and the small, recessed crown uncomfortable for winding. The Milanese bracelet is also a point of contention, with some finding it may not articulate well for smaller wrists. Accuracy figures vary, with one owner reporting +1/+2 seconds per day and another around -6 seconds per day.

From video reviewers

The unique natural stone dials are a standout feature of the Baltic Prismic Stone. The slim 9mm case, constructed from stainless steel and Grade 5 titanium, is also a notable aspect. However, some buyers may find the price of €1,300 to be a trade-off, considering the watch's Swiss movement and slim profile may not justify the cost compared to competitors.

Formex Reef GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

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