Harnessing kinetic energy and converting it into controlled precision movement of cogs and gears is the essence of automatic movements.
Normally, this is done with a spinning oscillating weight that winds a mainspring as the watch moves all day on a person’s wrist.
Moritz Grossmann is returning to a technique more commonly used in timekeepers from the 1800s: a hammer winding mechanism that more closely mimics the power generation and delivery from a grandfather clock’s pendulum.
The independent German watchmaker uses the hammer winding mechanism for its 106.0 movement, which is used in a new limited edition watch, the Hamatic Vintage.
One of the drawbacks of normal oscillating weights is that they tend to be substantial and obscure most of what is going on in a standard automatic movement.
The 106.0 movement’s hammer design is an improvement because its heavy gold hammer head barely gets in the way. Moritz Grossmann says the bidirectional automatic hammer winding mechanism transfers even the slightest arm movements to wind the mainspring.
The Hamatic Vintage, limited to 25 pieces, has a crystal case back exposing the movement, which has a 72 hour power reserve.
It comes in a 41mm white gold case and black dial with white numerals and polished steel hands.