Now you're just making stuff up instead of doing a simple Google search. Regular Seikos (ie a Seiko 5) can expect around +-20 sec per day. Same with Orient and similar brands that use very cheap automatic movements. Rolex watches often do better than +-2sec per day. If you think the difference between the two is marketing you are either engaging in sophistry or painfully uninformed.
This is the classic Rolex fan. Sort of brainwashed and clueless while insulting to others. Both spring drives and grands are more accurate than Rolexes. Beyond that who even cares. If you want accuracy certainly don’t get a mechanical watch.
If you meant Seikos high end products you should have said those, no one calls Grand Seikos just Seiko since they are very different. With that in mind I don't think we disagree very much here.
