You are becoming the Agrocybe expert! Make more collections, and make sure you preserve and label them. Try getting photos of the gill cystidia also, and Agrocybe has a lot of taxonomic significance on the cap surface, it’d be nice to see the details there.

Just adding some notes – Funga Nordica states that the spore sizes for A. praecox should be – 8-10 × 5-7 μm. Not sure if that helps…