No LeftCoastXpert, Ryan...but, I'd skip the new suit, imo.
Maybe dress slacks, shirt & jacket or, slacks, tie & jacket.

A S steel Rolex?! ...I'm with you.

Hellsbells, BB: you have forgotten more about "fashion" than
most of the hard core shoppers here, know. Jes' use your
judgement and dress "snappy casual" with maybe a jacket, imo.

Talk less, be enthused, answer succinctly, sell yourself without
coming on as a knowitall, sell what you can do for their operation,
etc. You know the drill...

Good Luck to you on your interview!
GL,mD