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Le Forban Sécurité Mer La BrestoisevsLongines ULTRA-CHRON CLASSIC

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

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La Brestoise
Le Forban Sécurité MerLa Brestoise
ULTRA-CHRON CLASSIC
LonginesULTRA-CHRON CLASSIC
MSRP $4,000
Buy from Le Forban Sécurité Mer ↗
Buy used on eBay ↗
Buy from Longines ↗
Buy used on eBay ↗

At a glance

21 of 29 specs differ
Diameter
La Brestoise39mm
ULTRA-CHRON CLASSIC40mm
Power Reserve
La Brestoise42h
ULTRA-CHRON CLASSIC72h
Water Resistance
La Brestoise150m
ULTRA-CHRON CLASSIC30m
MSRP
La Brestoise—
ULTRA-CHRON CLASSIC$4,000

Full specifications

Case

8 specs
Diameter
39mm
40mm
Thickness
12.7mm
10.95mm
Lug-to-Lug
45mm
47.2mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
—
Water Resistance
150m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

5 specs
Crystal Shape
Flat
—
AR Coating
Inner
Both sides
Dial Color
—
Silver
Indices
Applied
Applied indexes
Lume
None
Super-LumiNova

Movement

7 specs
Caliber
Miyota 8215
L836.6
Beat Rate
28,800 vph
25,200 vph
Power Reserve
42h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds, moon phase display and date indicated by small hand at

Pricing

1 specs
MSRP
—
$4,000
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