Lonegrade Glossary of Terms 


While many of our customers are seasoned watch enthusiasts, maybe this is your first time buying a timepiece and you’re still wrapping your head around the lingo. Below is a brief glossary of terms that can help you understand common features you’ll encounter.


Analogue Watch

A watch with a non-digital display, typically featuring a classic clock-style design with hands that point to number or roman numerals.

316L Stainless Steel

Stainless steel is a highly durable alloy that is resistant to rust and corrosion. 316L stainless steel is a surgical grade that is hypoallergenic. 


ATM stands for Atmospheres, a unit of measure used for pressure tests. The ATM number reflects a watch’s ability to resist water at various pressures. This is commonly converted to a water depth for easier understanding. Each ATM is the same as 33 feet (10 meters) of static water pressure.


The battery is the energy source for a Quartz movement. A high quality battery will last between 18 and 24 months, at which time a new battery will need to be installed.


Surrounding and securing the crystal to the watch is a ring of metal called a bezel. 


The caliber is the number and letter combination that identifies the manufacturer and movement variety of a watch.


The case, often called the body of the watch, is the exterior portion of the watch that houses the movement, dial, hands and other internal components.


The caseback is attached to the underside of the watch case and lies adjacent to the skin. Lonegrade casebooks are made with 316L stainless steel and engraved with watch and movement information.


The crown is a small knob that extends from the side of the watch case. Lonegrade crown’s are used to adjust the time.


The crystal is the transparent layer that sites above the watch dial to protect it and the internal components from external elements. Lonegrade watches are made with scratch-resistant sapphire crystal.


The dial of the watch, commonly referred to as the face, features the indicators, numbers, tics and indices that are used in conjunction with the hands to tell the time.

Full Grain Leather

Full grain leather comes from the top layer of the hide and includes all of the natural surface textures. As full grain leather ages, it develops a patina and unique character. 


The gaskets of a watch are located in several locations, including the casebook, crystal and crown. They are often made from rubber or rubber-like material and help prevent water from entering the watch.


The hands are the part of an analog watch that point to the current hour, minute or second time. The Lonegrade HDR140 features a mystery dial instead of a traditional hour hand.


The index is a line on the dial used in place of hour numerals


Jewels are the small rubies or synthetic rub that reduce friction within a watch to help maintain the watch’s accuracy over time.


The lugs are the part of the watch case that extend outward to allow the watch straps to be securely attached.


The photoluminescence pigments used to illuminate the dial and hands in the dark. Modern lume pigments are aluminate-based, and are both non-radioactive and non-toxic like older lume pigments. 

Mystery Dial

The mystery dial of the Lonegrade watch is used instead of a tradition hour hand. It is comprised of a thin disc engineered with such tight tolerances that it appears to blend in with the dial.

NATO Strap

The NATO strap is the commonly used nickname for the G10 watch strap developed by the British Ministry of Defence. They are made with a single or double layer of material that slides underneath the case. This secures the watch, even if a spring bar pops out. Constructed from materials that are intended to withstand moisture, the NATO strap provides more flexibility than a leather strap.

Quartz Crystal

Quartz crystals help quartz watches keep very accurate time by maintaining a precise frequency standard, which helps regulate the movement.

Quartz Movement

Quartz movements convert electrical currents from a battery into the mechanical movement required to turn the watch hands. This current is passed through a quartz crystal which maintains a precise frequency standard. This enables quartz movement powered watches to maintain extremely precise time.

Quick Release

Watches typically require spring bars, which are small spring-loaded tubes that attach the watch strap to the watch lugs. Quick release are a type of spring bars which feature small pins that when pressed to the left allow the strap to be removed or attached. These enable a watch owner to change watch straps easily and without any tools. All Lonegrade watch straps feature quick release spring bars.

Sapphire Crystal

This transparent, scratch- and shatter-resistance layer protects a watch from external elements. It is made from synthetic sapphire, one of the hardest and most durable materials. Lonegrade sapphire crystals also feature a coating of anti-reflective material on the inner surface to prevent glare while maintaining the durable qualities of the sapphire.

Seat Belt Weave Nylon

This material is the same smooth, soft and incredibly durable materials used in automobiles for seat belts. The dense weave of the material provides thickness and durability, but is very soft. Able to withstand getting wet and being easily washable, this is strap is more flexible than a leather strap.

Swiss Ronda Caliber 713 Movement

The movement used in the HDR140. This ultra-reliable Swiss-made Ronda Caliber 713 quartz movement features reliability at -10/+20 seconds per month.

Water Resistance

Water resistance indicates the extent to which a watch can be exposed to water. It is measures in ATM (Atmospheres), which is often translated into a water depth number. Lonegrade watches feature a 10 ATM water resistance.