In about May 1936 purchasers of the pickup (Model 67) and the big truck (Model 51) could purchase the Deluxe Package. This came with a chrome grille, chrome windshield surround, chrome rear view mirror, drivers sun visor, dual wipers, dual horns with both with chrome bell and horn, cigar lighter and ash tray, dome light, and sliding back window - all for $35! The 1936 chrome grille has different part numbers for the painted an chromed versions. There is only one part number for the 1935 radiator grille shell, so I'm inclined to think that any 1935 chromed truck grilles are one-off or custom, not a factory option unlike those in 1936.
I have to admit that the deluxe package makes for a really nice looing truck! Wish I could purchase all those parts for $35 today!!