To my knowledge there was not a 2nd plate with a specific model number. That data was provided by deciphering the ID number. Here's a pic I snagged showing the single plate with a space and holes above it for a 2nd possible plate. Nothing there in this pic, but perhaps some of our 1946 Chevy truck owners will chime in with pics or info from their trucks.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)