Side by side

Longines MASTER COLLECTION CHRONO MOONPHASEvsYema Superman Slim CMM.20

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

MASTER COLLECTION CHRONO MOONPHASE
LonginesMASTER COLLECTION CHRONO MOONPHASE
MSRP $4,150
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372
What people say

Owners + reviewers, side by side

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

Longines MASTER COLLECTION CHRONO MOONPHASE

Owners widely praise the Longines MASTER COLLECTION CHRONO MOONPHASE for its beautiful and legible dial, offering significant complications for its value. Accuracy figures vary, with one owner reporting +8 seconds per day and another stating it is their most accurate watch. Some find the chronograph hour hand placement inconvenient, and the date hand can occasionally overlap the hour hand. The watch is noted as being thick, typical of Valjoux-based chronographs, and its 3 bar water resistance limits it to less demanding environments. One owner observed scuffs on the case of their example, and another found the blue on the band and numerals less vibrant than pictured. Overall, owners rate the Longines MASTER COLLECTION CHRONO MOONPHASE highly for its impressive complications and aesthetic appeal at its price point.

Yema Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

At a glance

21 of 29 specs differ
Diameter
MASTER COLLECTION CHRONO MOONPHASE40mm
Superman Slim CMM.2039mm
Power Reserve
MASTER COLLECTION CHRONO MOONPHASE
Superman Slim CMM.2040h
Water Resistance
MASTER COLLECTION CHRONO MOONPHASE30m
Superman Slim CMM.20300m
MSRP
MASTER COLLECTION CHRONO MOONPHASE$4,150
Superman Slim CMM.20$2,372

Full specifications

Case

9 specs
Category
Chronograph
Diver
Diameter
40mm
39mm
Thickness
14.3mm
9.95mm
Lug-to-Lug
46.7mm
Lug Width
21mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
30m
300m
Caseback
Solid

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Ivory
Black
Indices
Applied

Movement

6 specs
Caliber
L687.5
Yema CMM.20
Beat Rate
0 vph
28,800 vph
Power Reserve
0h
40h
Jewels
0
25
Hacking
No
Yes
Hand-winding
No
Yes

Pricing

1 specs
MSRP
$4,150
$2,372
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