Prospex Turtle TPD & Winder Settings | Swiss Watch Store

Wondering how to programme your watch winder for the Seiko Prospex Turtle? You are in the right place. This model carries reference SRPE93. It is powered by the Calibre 4R36 movement. Below are the correct TPD and rotation-direction figures for this model, so your watch is always ready to wear.

TPD and Winding Direction

The correct setting for the Prospex Turtle is 650 turns per day, bidirectional: 650 turns per day with the rotor turning in both directions.

Turns per day (TPD)	650
Rotation direction	Bidirectional
Movement	Calibre 4R36

Why the Correct Setting Matters

An automatic watch is only as accurate as its power reserve allows. Keep the mainspring properly tensioned and the Prospex Turtle will hold its rate and be ready to wear the instant you pick it up — no resetting the time and date. Set the TPD too low and the watch can run down between wears. The movement will not be damaged (modern automatics have a slipping mainspring that prevents overwinding), but an under-wound watch is simply not doing its job. Correct settings are about accuracy and readiness, not safety.

Choosing a Watch Winder for the Prospex Turtle

The key feature to shop for is programmability: independent TPD and direction controls that cover 650 TPD bidirectional. Single-watch winders are ideal if the Prospex Turtle flies solo; multi-watch winders make sense the moment you own two or more automatics. Our watch winder collection covers both.

Prospex Turtle Winder FAQs

What's the correct TPD setting for the Prospex Turtle?

The Prospex Turtle is specified at 650 turns per day. Most programmable winders offer this as a standard preset.

Which winding direction should I use?

Bidirectional — the winder should rotate in both clockwise and anticlockwise directions.

Can I use any watch winder for my Prospex Turtle?

Yes — provided it's programmable. Verify the winder offers 650 turns per day with bidirectional rotation before buying; fixed-setting winders may not match.