Box Crown Fork Question


I have a question for some of the old Fat City employees that post here from time to time; I have a few different Box Crown forks and some are slightly different than others, different fork rakes, different drop outs, rack mounts vs. no rack mounts, the "box" at the crown is larger or smaller on some...I know that most were made with Reynolds fork blades and came with the decals saying "Reynolds 531", but a few were made from Tange Prestige and Wendyll once told me that although rare there were Prestige Box Crowns made...Does anyone know how to tell the difference?