The 1947-1954 Chevrolet Truck Factory Assembly Manual shows Part numbers (Check Attachments) for the Seat Back Trim Panel
but the numbers don't match in the Master Parts Catalogs.
RPO 430 & 431 < (Attachment Link)
3712326 - GREEN
3712327 - BLUE
3712328 - BROWN & BIRCH
3712329 - MAROON & BEIGE
RPO 387 < (Attachment Link)
3701127 - No color stated
1929 - 1954 Master Parts and Accessories Catalog
Grp # 16.724 TRIM, Seat Back
1929 - 1957 Chevrolet Master Parts & Accessories Catalog
Grp # 16.724 TRIM - CLIP, Seat Back
I don't know why they have two RPOs for the rear corner windows in the Factory Assembly Manual ?
The Seat Back Trim Panel must of only been used on seats that where installed in a RPO rear corner window cab.
FYI, CCAB = Conventional Cab
I saw it in the 29-54 MPC but not in the 29-57 MPC.
Took me awhile to figure that one out. it was not in the abbreviation list.
xfiles