The wait is over. The San Martin SN0121TF 39mm GMT Watch is now back in stock, bringing an upgraded GR5 titanium construction, the HZ6460 automatic GMT movement, and a 5-layer colorless anti-reflective sapphire crystal.

For customers who have followed this model before, there is also an important naming update:

The model previously known as SN0121TC is now called SN0121TF.

If you have been searching for the SN0121TC, the SN0121TF is the current model name.

Upgraded GR5 Titanium: Lighter, Stronger, More Comfortable

One of the most important features of the SN0121TF is its upgraded Grade 5 titanium construction.

Compared with traditional stainless steel, titanium provides an excellent combination of low weight, strength, and corrosion resistance. This makes the SN0121TF especially comfortable for everyday wear, while retaining the rugged character expected from a serious GMT watch.

The 39mm case size also keeps the watch compact and versatile, making it suitable for a wide range of wrist sizes.

Key benefits of GR5 Titanium:

• Lightweight for comfortable daily wear
• High strength and durability
• Excellent corrosion resistance
• Distinctive titanium finish
• Ideal for travel, outdoor use, and everyday wear

5-Layer Colorless Anti-Reflective Sapphire Crystal

Another highlight is the 5-layer colorless anti-reflective sapphire crystal.

Rather than adding a noticeable colored tint to the crystal, the colorless AR treatment is designed to reduce reflections while maintaining the natural appearance of the dial.

The result is a clearer and cleaner view of the dial under different lighting conditions, allowing the blue and black dial options to retain their original character.

For a watch designed for travel and outdoor use, improved visibility is a small detail that can make a meaningful difference in everyday wear.

Maximum Clarity. Minimal Reflections.

Combined with the scratch resistance of sapphire crystal, the multi-layer AR treatment gives the SN0121TF a practical upgrade you can appreciate every time you check the time.

Powered by the HZ6460 Automatic GMT Movement

Inside the SN0121TF is the HZ6460 automatic mechanical GMT movement, featuring a central GMT hand for tracking an additional time zone.

Whether you're traveling internationally, working across different time zones, or simply enjoy the functionality of a mechanical GMT watch, the SN0121TF combines practical travel functionality with a clean, tool-watch design.

Blue or Black?

The SN0121TF is currently available in two classic configurations.

Blue brings a sportier look, with the blue dial and matching 24-hour bezel complemented by the contrasting GMT hand.

Black keeps things understated and versatile, offering a classic tool-watch appearance that works easily with almost any style.

Both versions retain the recognizable GMT layout while benefiting from the upgraded GR5 titanium construction.

Built for Everyday Wear and Adventure

With its combination of a 39mm case, GR5 titanium construction, sapphire crystal, automatic GMT movement, and 300M water resistance, the SN0121TF is designed to transition easily from daily wear to travel and outdoor use.

It is lightweight without feeling delicate, functional without becoming oversized, and built around features that are genuinely useful on the wrist.

SN0121TF Now in Stock — Shipping Within One Week

The San Martin SN0121TF is now back in stock, and current orders are expected to ship within one week.

If you previously knew this watch as the SN0121TC, remember that the current model name is now SN0121TF.

San Martin SN0121TF
39mm | Upgraded GR5 Titanium | HZ6460 GMT | 5-Layer Colorless AR Sapphire Crystal | 300M Water Resistance

Lighter. Stronger. Clearer. Ready for the next journey.