A timekeeper for globetrotters

Calibre 100.7




The movement

The Grossmann balance

ratchet wheel is finished with a delicate snailing decoration

The engravings by hand

Setting the time windows and the main time via the crown at 3 o’clock

Setting the main time separately via the crown at 10 o’clock

The movement

The new calibre 100.7 of the UNIVERSALZEIT was specially developed by Grossmann’s designers in the manufactory.

The calibre 100.7 is testimony to the consummate craftsmanship and ultimate in finishing from the house of Moritz Grossmann.

The sophisticated design of the pillar movement is complemented by the intricate workmanship seen in every component, which are all finished by hand. The floral pattern on the balance and escape-wheel cock is engraved by hand, as is the lettering on the wheel bridge. Traditional cuts and polishes have been applied to the surfaces of other parts.

The Grossmann balance

The UNIVERSALZEIT breathes at a calming traditional rate of 18,000 semi-oscillations per hour. The calibre 100.11 incorporates the newly designed Grossmann balance and demonstrates that rate accuracy is not achieved solely with a higher frequency. Optimised for artisanal manufacturing techniques, the design of the balance improves the adjustability of inertia and achieves high kinetic energy combined with minimised air resistance and the smallest possible mass. The number of screws in the balance-wheel rim was minimised as well. Mass screws with different head lengths are used to incrementally vary the moment of inertia. Additionally, the rim is provided with uniformly spaced bores that allow reductions in mass or contribute to the poising of the balance. The smooth cylindrical balance staff is integrated in the hub and can easily be replaced if necessary. The Grossmann balance interacts with a Nivarox balance spring which is overcoiled with a quarter arc on the inside and secured to the slotted roller with a brass pin.

ratchet wheel is finished with a delicate snailing decoration

Further evidence of the highest standards of German craftsmanship can be seen on the ratchet wheel with its three-band snailing, framed by broad chamfers polished to a high gloss sheen.

The engravings by hand

All engravings and inscriptons on the 2/3 plate and the balance cock are always engraved by hand.

Setting the time windows and the main time via the crown at 3 o’clock

The hours in the time windows and the main time are set via the crown at 3 o’clock. When the minute hand passes 12, the time in the time windows jumps forward by one hour.

A disc connected to a 24-tooth ratchet wheel moves beneath the dial. This is printed with a multitude of numerals from 1 to 24, each arranged at an angle of 15 degrees across a total of six rings.

When the minute hand moves over the 12, the ratchet wheel and with it the disc move forward by one position. The disc is precisely positioned by a ratchet spring. Thanks to the optimal alignment of the numerals on the disc, the hours are aligned horizontally in the windows, making it easy for the wearer to read them.

When setting the watch, the time in the time windows must be adjusted in advance. Knowing the current time zone for one location is sufficient for this. The time in the other windows is automatically synchronised when it is set.

Setting the main time separately via the crown at 10 o’clock

The hour hand of the main time can be moved backwards and forwards separately in hourly increments using the quick adjustment mechanism. This does not change the time display in the windows. The mechanism allows the operator to engage the crown in two positions at 10 o’clock and then use a pusher function to correct the hour hand independently of the disc. In the middle position, a stop prevents the pusher from being operated. This prevents accidental adjustment of the time.

Tech Specs


100.7 型自製機芯,手動上鏈,五方位調校


格羅斯曼擺輪;透過側方按鈕解鎖指針設定並啟動機芯;節省空間、經過改良的格拉蘇蒂棘輪,具有回轉功能;透過位於階梯式擺輪凸輪上的格羅斯曼的微調計螺絲進行調校;導柱機芯帶有未經處理的德國銀材質的 2/3 夾板與支柱;擺輪與擒縱輪板帶有手工鐫刻;寬形橫向格拉蘇蒂菱紋;棘輪帶有三重階梯式太陽紋飾;可單獨拆卸的離合上鏈裝置;停秒功能,用於指針設定;中央四番輪;以螺絲固定的凸出黃金套筒;全新開發模組,用於顯示所選大都會的全部時間;10 點鐘位置的調校機構,佩戴者改變所在地點時可以調整時針




292 個


31 顆寶石,其中一顆安裝在壓製的黃金套筒中




防震式軸承固定格羅斯曼擺陀,帶有 4 個平頭螺絲與 2 個微調螺絲,Nivarox 1 游絲帶有 80 號寶璣末端曲線,形狀源於古斯塔夫·戈斯騰柏格(Gustav Gerstenberger)


直徑:14.2 毫米,振頻:18,000 次/小時


儲存上滿鏈 42 小時




直徑:44.5 毫米,厚度:13.78 毫米

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Calibre 100.7

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