Ronda caliber 8040.N in Invicta Watch

Ronda Caliber 8040.N

Ronda 8040.N

Brand Ronda
Caliber Number 8040.N, 8040, 8040N
Line Mastertech 8000
Type Quartz
Size 15”’ x 5.6mm thick
Diameter 34.60mm
Battery Cell Number 395
Hands 120/70/20/160
Claimed Battery Life 48 months
Jewels 13
Hacking? Yes
Functions Hours, minutes, central chronograph seconds, 1/10 seconds counter, 30 minute counter, 10 hour counter, retrograde day, big date, small seconds subdial
Swiss Made or Swiss Parts
Known Models
Invicta 13686, Invicta Sea Hunter 1064

According to the Ronda website, the caliber 8040.N features:

  • Repairable metal watch movement
  • Very long battery life
  • Power saving mechanism with pullled out stem: Reduction of consumption approximately 70%
  • Very easy handling by two pushers
  • Big date with quick change

This caliber was submitted by Bill. He found it in an Invicta Reserve model number 13686:

One of Ronda‘s more elaborate and expensive Swiss Made Quartz movements. RONDA Mastertech Caliber 8040.N Size 15”’ Found in several Invicta models, and probably other brands also. -Bill B.

Example from an Invicta Jason Taylor Chronograph:
Ronda caliber 8040.N in Invicta Watch

Movement Drawings:

Other examples of watches with this movement:

Please lets us know your thoughts and experience below. And please send high quality pics if you have any.


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Bill Bennett
Bill Bennett

Here are some other Invicta models with the 8040.N movement: Venom 17635, Subaqua 16307, Bolt Zeus 12298/12299, Excursion 17470, Sea Hunter 10721, Sea Base 17983, and Model 22283. Bulova Accutron 63C109, S. Coifman SC0321, and Aragon M.Diver 80Aragon. There are others with this exclusive caliber.

Michael Kelly
Michael Kelly

This is a very cool looking movement with the grande date and the retrograde day of the week. I am glad to see that Wing is now using this movement in his Aragon watches. I will have to check those out. I thinkers the Invicta Excursion is a great looking watch. I’m a sucker for the “mirror polished” look and have an Aragon with that high polished look. I believe it is my favorite watch

Jordi V.
Jordi V.

Bruno Söhnle’s “Marcato” also wears this movement.

Adrian Ross
Adrian Ross

Found this movement Ronda 8040.N in a Tornino Lamborghini

Chris Paluck
Chris Paluck

EDOX uses this in several watches as well.


This movement is used in the Ruf Pilot Sport 48mm. Haven’t received mine as of this post but aesthetically it is very similar to the iconic IWC Big Pilot and nearly as beautiful.

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