Side by side

Serica Ref. 5303 Diving ChronometervsCincinnati Watch Company Union Terminal Mechanical

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

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
Union Terminal Mechanical
Cincinnati Watch CompanyUnion Terminal Mechanical
MSRP $650

At a glance

21 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Union Terminal Mechanical38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Union Terminal Mechanical
Water Resistance
Ref. 5303 Diving Chronometer300m
Union Terminal Mechanical30m
MSRP
Ref. 5303 Diving Chronometer$1,768
Union Terminal Mechanical$650

Full specifications

Case

9 specs
Category
Diver
Dress
Diameter
39mm
38mm
Thickness
12.2mm
0mm
Lug-to-Lug
46.5mm
0mm
Lug Width
20mm
0mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
300m
30m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
Domed
AR Coating
Yes
Dial Color
Enamel Black
Multiple
Indices
Applied
Lume
Super-LumiNova
BGW9

Movement

6 specs
Caliber
M100 COSC
Sellita SW210
Type
Automatic
Manual
Beat Rate
28,800 vph
0 vph
Power Reserve
42h
0h
Jewels
25
0
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$650

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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.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

Cincinnati Watch Company Union Terminal Mechanical

Owners praise the Cincinnati Watch Company Union Terminal Mechanical for its striking design and historical significance, particularly for Cincinnati natives. One owner highlights its suitability as a dress watch, finding it wears well on a leather strap. The watch is noted for its colors and design inspired by the Union Terminal clock, with a portion of sales supporting the landmark. At just over $350, it is considered a good value despite not featuring a high-end movement, strap, or crystal. Overall, owners rate the Cincinnati Watch Company Union Terminal Mechanical highly for its unique design and local historical connection at an accessible price point.

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