Are these post-'78 cranks?
No, the one pictured is a 74 and the better one I was referring to has no date stamp so I guess it is pre 72.
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1971 Paramount P-13 Chrome
1973 Paramount P-15 Opaque Blue
1974 Raleigh Professional Blue Mink
1991 Waterford Paramount
Holland Titanium Dura Ace Group
Holland Titanium Ultegra Triple Group