King Seiko TPD & Winder Settings | Swiss Watch Store
Winding settings are one of those details that separate a watch that runs perfectly from one that is constantly being reset. For the Seiko King Seiko, reference SPB365, the correct combination is specific to its movement — Calibre 6R55. This guide lays out the exact TPD requirement and winding direction, in plain terms.
Turns per day and winding direction
The King Seiko requires 650 turns per day, winding bidirectional (rotating both ways). Getting both numbers right matters: the TPD figure keeps the mainspring at a healthy level of charge, while the direction ensures the rotor engages efficiently rather than spinning freely.
What correct winding actually buys you
Two things: a watch that is ready, and a watch that is right. A King Seiko held at its proper TPD stays wound between wears, so there is no resetting the time and date every few days, and the movement runs within its best rate. Modern automatics cannot be harmed by an incorrect setting — the slipping mainspring bleeds off excess winding — but only the correct setting keeps the watch performing as designed.
Which winder should you buy?
For the King Seiko, the key feature is programmability: the winder must let you set the TPD figure and rotation direction listed on this page. Beyond that, it is a question of capacity. One watch? A single winder does the job beautifully. Several automatics? A multi-watch winder saves you configuring each piece separately. Take a look at our watch winder collection for options at every capacity.
Frequently asked questions
What TPD does the King Seiko need?
650 turns per day is the setting to use, with the winder in bidirectional (rotating both ways) mode.
Which winding direction should I use for the King Seiko?
Wind it bidirectional (rotating both ways). Getting the direction right keeps the rotor working efficiently.
Will any automatic watch winder work with the King Seiko?
A programmable winder is recommended — it lets you match the exact TPD and direction this watch needs.