Probably a 7006- or 7009- in my opinion, Agree it could be 7S26 but my gut tells me not.
The "SEIKO" name emblem is missing. That is 100% the Seiko "5" emblem just below where the name emblem is missing.
I would steer clear of buying this one, if that was your intent. My experience tells me it's all wrong and won't be worth the cost to repair. Just my 2 cents.