Service replacements (the number in the parts book) are seldom the same as the original production-line part; they are functional replacements, and will SERVICE the application, but are seldom "correct" from an originality perspective. '67 Trico blade holders are satin finish, 15" long, and have a pronounced sharply-peaked shape their full length; I think Pete Lindahl posted the correct original part number over on the NCRS Board.
That's the key difference between NOS (the original production-line part) and NORS (New Old Replacement Stock) service replacement parts; 90% of the stuff advertised on eBay as "NOS" is actually "NORS" - it'll work just fine, but it's NOT the same as the original production part - it just SERVICES the application.