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Ulysse Nardin · Blast

Ulysse Nardin Blast Tourbillon 45 mm

Reference 1723-400-3B/BLACK · Tool · 45 mm

Ø 45 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
1723-400-3B/BLACK
Family
Blast
Category
Tool
Status
Current
Case material
Titanium
Case diameter
45 mm
Case thickness
12.6 mm Official
Lug-to-lug
—
Lug width
—
Water resistance
50 m
Bezel
—
Calibre
UN-172 Official
Power reserve
72 h
Frequency
18,000 vph (2.5 Hz)

Official product page · retrieved October 20, 2026

Does it fit your wrist?

Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.

No lug-to-lug dataFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmNo lug-to-lug dataCase diameter 45 mm
Side view, across the wrist

No lug-to-lug figure exists for this reference yet, so fit cannot be computed.

Measurements and sources

Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.

Case thickness

Value Type Source Date
12.6 mm Official Ulysse Nardin October 20, 2026

Lug-to-lug

No source gave this figure yet.

Lug width

Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.

No source gave this figure yet.

Calibre source

Official Ulysse Nardin · retrieved October 20, 2026

Other versions in the same case

These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.

Other Blast references

Watch Ø Thickness Lug-to-lug Calibre
Blast Hourstriker 45 mm 6215-400-3A/02 45 mm 16 mm — UN-621
Blast Free Wheel 45 mm 1760-401-3A/3A 45 mm 12.4 mm — UN-176
Blast Tourbillon Free Wheel 44 mm 1766-176LE/AVE 44 mm 13.46 mm — UN-176
Blast Amoureuxpeintre 42 mm 3713-260LE-9A-SEVER/0A 42 mm 10.17 mm — UN-371
Blast Skeleton X 42 mm 3713-260-3/03 42 mm 10.65 mm — UN-371
Blast Dual Time 42 mm 243-20-3/43 42 mm 10.05 mm — UN-24

Other Ulysse Nardin models

Watch Ø Thickness Lug-to-lug Calibre
Freak Vision 45 mm 2503-250LE-2A-BQ/1A 45 mm 14 mm — UN-250
Freak ONE Blue Enamel 44 mm 2403-500LE-3AE-BLUE/3A 44 mm 13.3 mm — UN-240
UR-FREAK 44 mm 2413-500LE-2A-UR/3B 44 mm 13.77 mm — UN-241
Super Freak 44 mm 2520-500LE-3A-BLUE/3A 44 mm 16.54 mm — UN-252
Freak X 43 mm (13.38 mm high) 2303-270/00 43 mm 13.38 mm 49.4 mm UN-230
Freak X 43 mm (13.92 mm high) 2303-270-4A/1A 43 mm 13.92 mm — UN-230
Show 19 more
Watch Ø Thickness Lug-to-lug Calibre
Freak X Enamel 43 mm 2303-270LE-3AE-SED/3A 43 mm 13.78 mm — UN-230
Freak X 41 mm 2323-500-3A/7A 41 mm 13.6 mm — UN-232
Freak X Gold 41 mm 2322-500-2A/1A 41 mm 13.6 mm — UN-232
Diver AIR 44 mm 3743-170-2A/0A 44 mm 14.76 mm — UN-374
Diver X Cape Horn 44 mm 1183-170LE/92-CAP 44 mm 14.81 mm 50.2 mm —
Diver X Skeleton 44 mm 3723-170LE-2A-BLACK/3B 44 mm 15.7 mm — UN-372
Diver 44 mm 1183-170-8A/0A 44 mm 14.81 mm — UN-118
Diver Chronograph 44 mm 1503-170-2A/0A 44 mm 16.1 mm — UN-150
Marine Torpilleur Annual Chronograph 44 mm 1533-320LE-0A-175/1A 44 mm 13.66 mm — —
Diver 42 mm 8163-175-7M/92 42 mm 12.15 mm 47.5 mm UN-816
Tellurium Johannes Kepler 43 mm 889-70 43 mm 15 mm — UN-87
Marine Torpilleur 42 mm 1183-310-3/43 42 mm 11.1 mm — UN-118
Marine Torpilleur Moonphase 42 mm 1193-310LE-0A-175/1A 42 mm 11.13 mm — —
Marine Torpilleur Tourbillon 42 mm 1283-310-0AE/1A 42 mm 11.93 mm — UN-128 Constant
Planetarium Copernicus 41 mm 839-70 41 mm 13 mm — UN-80
Classico 40 mm (10.2 mm high) 3202-136LE-9C-LIU/1A 40 mm 10.2 mm — UN-320
Classico 40 mm (9.6 mm high) 8152-111LE-9E-OX/1A 40 mm 9.6 mm — UN-815
Classico Manufacture 40 mm 3203-136-2/E0-42 40 mm 10.2 mm — UN-320
Classico Rat 40 mm 8152-111LE-2/RAT 40 mm 6.9 mm — —

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