In 1947 (actually 1948) there was a government order to mint 150,000,000 coins of 1 peseta. A new order extended it in 1953; but when the minting began according to the 1953 order, the 1947 quota had not yet been finished, so it was used.
Then in 1955 were minted coins with 1947 (with stars 19-54 and 19-56) and 1954 (19-54 and 19-56). It isn't sure how many coins each year-stars. Aledon (likely the best reference for pesetas) says: