If SD == Quartz
then El primero == miyota 9015?
why pay for an expensive EP mvmt when a miyota uses the same concept of Balance wheel and escapement?
to quote
The new 6Rxx movement from Seiko is quite comparable to ETA’s 2824 in terms of reliability and features. Even the Miyota 9015, though with a noisier rotor, offers an efficient alternative. Swiss movements, though, have better power reserve than Japanese movements and require less winding. To sum up, Swiss movements are still slightly more robust and efficient. This being said, with Swatch limiting the supply of ETA movements to outside of the group brands, the popularity of Seiko and Miyota movements will certainly be on the rise.
I’m just gravitating towards the Swiss. They have the history plus some beautiful craftsmanship there. Also many innovation in horology originated from there.
But in terms of value for money, Japan win hands down.
in any case, i have no interest to start or bring the debates here over SD being Quartz or Mechanical from other forums
i have wrote clearly my opinions about SD are purely my personal opinion.
SD is rather like a psychology inkblot picture, one can see it as a Mechanical with an improve time keeping method or a Quartz with a mechanical movement for power.
Swiss calibre 321 when to the moon
Japan Seiko 8L35 dived into the deep sea with a record of 4000m+
its up to other forumers to decide themselves