Rusty Neon
Deck 02
My hunch is that Deck 02 (Grimaud B.P. - no copyright year) pre-dates the decks with 1963 copyrights. Presumably, they would have begun putting on the 1963 copyright starting a some point in time in either 1963 or possibly a subsequent year; so they probably wouldn't have printed cards after that point in time without the copyright indication. (Compare U.S. Games, which didn't start putting on the 1971 copyright indication on the Rider-Waite cards until around 1975.)
Deck 04
An interesting thing about Deck 04 (English-French bilingual titles) is that I've seen at least tarot books published by francophones that use cards from this deck; one book even blanks out the English titles. This may suggest that, for a time, Grimaud didn't put out Marteau decks with French-only card titles.
My hunch is that Deck 02 (Grimaud B.P. - no copyright year) pre-dates the decks with 1963 copyrights. Presumably, they would have begun putting on the 1963 copyright starting a some point in time in either 1963 or possibly a subsequent year; so they probably wouldn't have printed cards after that point in time without the copyright indication. (Compare U.S. Games, which didn't start putting on the 1971 copyright indication on the Rider-Waite cards until around 1975.)
Deck 04
An interesting thing about Deck 04 (English-French bilingual titles) is that I've seen at least tarot books published by francophones that use cards from this deck; one book even blanks out the English titles. This may suggest that, for a time, Grimaud didn't put out Marteau decks with French-only card titles.