With the red ring. The one without is the cheaper Tropical model with single coating and no field flatteners. Albinos site have tests of both models. The SP is significantly better.
https://www.allbinos.com/291-binoculars_review-Nikon_7x50IF_SP_WP.html
https://www.allbinos.com/256-binoculars_review-Nikon_7x50IF_HP_WP_Tropical.html
Nikon don't call it the Prostar anymore. That seems to be something Nikon (US) made up as well as a fancy price.
Actually I paid less than that buying on Amazon Prime UK. If something doesn't sell in over a year the automated algorithm they use starts reducing the price by around 4% every few days. The same applies to amazon Warehouse returns with overstock situations.
They had 2 in stock and I held my nerve until it reached £303 GBP (actually £252 as I'm a registered business and get the VAT back.)
Once a purchase is made the price shots straight back up to the original and the process starts again. 7x50 binoculars are very slow sellers, you can never get a mad deal like this on faster moving items like Zeiss or Leica !