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Monta Caliber M 23

Monta Caliber M-23

Monta Caliber M 23

ManufacturerMonta
Caliber NumberM-23
Base Caliber
ETA 2893-2 or Sellita SW330-1
Lignes11.5”’
Diameter
26.20mm
Casing Diameter
25.60mm
Thickness4.10mm
Vibrations Per Hour28,800 bph, 4Hz
Jewels21 or 25
Lift Angle51 degrees
Power Reserve42 hours
Hacking?Yes
Quick Date?Yes
Anti-ShockIncabloc
FunctionsHours, minutes, central seconds, central GMT hand, date at 6:00
Country of ManufactureSwitzerland
Known Models
Atlas, Skyquest

The Monta caliber M-23 is an automatic movement used in the microbrand’s Atlas and Skyquest models. It features a second time zone via a centrally located GMT hand, as well as a date window located at 6:00.

In Monta’s own words:

“The MONTA M-23 caliber is an automatic movement featuring a beat rate of 28,800 beats per hour (4 HZ) and displays hours, minutes, seconds, date, and GMT functions. It also features hacking seconds to allow for precise synchronization. Manufactured and assembled entirely in Switzerland, it is designed for an active lifestyle and features a 42-hour power reserve.” -Monta

This movement can be based on either an ETA caliber 2893-2 or Sellita SW330-1. In this post on Instagram, @montawatch says:

“The Skyquest features our MONTA caliber M-23 which is either a Sellita SW330 or ETA 2893-2 base movement. We add a custom rotor and our in-house watchmaker performs the final QC to ensure accuracy.”

There doesn’t seem to be an option to select one or the other when placing an order on their site. If you have a Monta timepiece with this movement, please comment below which base movement you received and share your experience with selection.

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