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.
Attachments
1946 Chevy Truck ID data plate on cowl.png (965.77 KB, 169 downloads)



~ Dan
1951 Chevy 3 window 3100
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"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)