While not yet used in the regular production perfect fake Speedmaster Moonwatch Professional, AAA best fake Omega introduced a new movement in early 2019 which was the first major evolution to be seen on the 1861 architecture since 1997. Launched in the gold Speedmaster Apollo 11 50th Anniversary and a couple of months later in the Steel Speedmaster Apollo 11 50th Anniversary, this new calibre, dubbed 3861, includes all the modern technologies that the brand developed over the past 10 years.
First, the calibre 3861 includes the co-axial escapement, which is a first for a hand-wound Speedmaster engine. Second, it is also Master Chronometer rated, meaning that it has been tested for both accuracy (within the specifications defined by METAS, meaning +0/+5 seconds a day) and magnetic resistance, with the ability to resist to fields up to 15,000-gauss. This has been achieved thanks to the use of silicon Si14 for the balance spring. While visually close to the Calibre 1861, almost all the parts have been upgraded – with now 26 jewels instead of 18 jewels, just as an indication of the work done – and even the power reserve is longer, now at 50 hours.
Since its introduction in 2019, this movement has also been used in the Speedmaster Silver Snoopy Award 50th Anniversary. But no regular production Speedmaster until today have been equipped with it.