It’s complicated
The Portugieser Tourbillon Retrograde Chronograph is an evolution of several processors in the Portugieser collection. More specifically, it elaborates on the Tourbillon Day & Night from 2024.
Both watches share the 18-karat Armor Gold case, crown and pushers, framing an obsidian-colored dial, which is achieved with 15 layers of transparent lacquer.
Along with the flying tourbillon, both dials have 18-karat gold-plated applied numeral hour markers along a railroad minute track. At the center are the signature Portugieser hands.
Functionally, the Portugieser Tourbillon Retrograde Chronograph has more in common with the Portugieser Perpetual Calendar, also released in 2024.
It has an automatic movement but differs with a simple retrograde date, which registers along a crescent 31-day track and jumps back at the end of the month.