360° protection system

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With the new ref. UT4-B, the iconic Modello Quattro undergoes full reconstruction, transforming it into the ultimate tool watch, while still remaining a benchmark of reliability and utilitarian simplicity. Thanks to the Seiko VH31 quartz movement that has been nested in the in-house designed 360° protection system and with its 300 m water resistance, the Modello Quattro UT4-B combines the best of both dive and field watch attributes.
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The 360° protection system is designed in-house and made in Italy to the highest standards. It is realised in a special blend of thermoplastic polyurethane (TPU) material.

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The system


Its custom construction, composed of a 360° protection shell that perfectly holds the movement and a dial top protective ring, allows the watch to withstand extreme environmental stress while still keeping it super light.

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MIL-STD-810 Drop Test

U.S. MIL-STD-810 is a United States Military Standard that emphasises tailoring an equipment’s environmental design and test limits to the conditions that it will experience throughout its service life, and establishing chamber test methods that replicate the effects of environments on the equipment rather than imitating the environments themselves.

The 360° protection system is engineered to absorb strong shocks and vibrations that could otherwise be damaging to the movement of the watch.

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The results

Verifying the capability of the UT4 (Unit under test) to withstand the shock due to an accidental fall in an urban environment.  The drop test was performed according to the parameters reported in the reference standard:


Height – 1,22 m
Impact surface – Industrial concrete
Drops – 26 (one for each surface, corner and edge)
Units under test – 5


After the impacts, all the 5 units under test were functioning. More thorough functional and integrity checks were performed, and no malfunctioning or damage was found in any of the units.

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Below you can find the test results carried out by an independent certified laboratory in Italy.


Check out the Modello Quattro UT4-B, featuring the U.S. MIL-STD-810 certified 360° protection system 360 logo. Available in a limited edition of 300 pieces.