Found an article in the ATHS "Wheels Of Time" Vol. 21, No. 5 with a story on Maple Leaf Trucks. Shows a photo of a Chevrolet Maple Leaf COE with the same all vertical bar grille as this one, & it is refered to as a HM series Maple Leaf COE. Article says truck should have Chevrolet insignia on the grille, but the ID tag will identify it as a Maple Leaf. a GMC of this same Vintage will have horizontal grille bars to each side. There's a '37 model GMC COE fuel truck in "THE Gallery".