Knightly helmets at the Battle of Crécy?

I'm building a Battle of Crécy diorama and need to decide which types of helmets to give both my French and English knights. Could you offer some guidance? From what I understand, the Battle of Crécy took place during a transitional period in knightly armour, when Great Helms were gradually being replaced by Bascinets. Are there any historical sources or scholarly estimates that indicate (even approximately) what percentage of knights would have worn Bascinets, either open-faced or fitted with visors, and how many would still have used Great Helms?