Just checked KLM website and see their are a mixed fleet of 175's, 190's, 737-700's and 737-800 operating up to 4 flights per day from late October.
Sunday 25th October shows mix of Boeing 737-700 and 737-800 operating all 4 flights from Newcastle,
https://www.klm.co.uk/search/offers?...-AMS:A%3ENCL:A