One three-holed landscape album page

Title: One three-holed landscape album page
Description: 1972 One three-holed landscape album page, almost 8½" x slightly over 12", containing stamps of Charles Baudelaire (1,30), Camille Saint-Saens (0,90), and Jean de La Fontaine (0,50). Besides the stamps, there are a large illustration and some explanatory text in French. The three stamps are all postmarked "18 - 1 - 72 Monaco A, Jour d'Emission." No. 35 du catalogue CEF. No. 1549 of 5,000 offset exemplars. Imprimé par Editions CEF à Nice. $7 from Topical Paradise Limited through eBay, Dec., '08.

The composite picture of the three men includes a crow with cheese, a tortoise, and perhaps both an oak and a reed near the portrait of La Fontaine. The common feature of the three men seems to be the year 21, since La Fontaine was born in 1621 and Baudelaire in 1821, while Saint-Saens died in 1921. Each of the three stamps includes the appropriate "21" date along with 1971. Did something perhaps go wrong with publication of the stamps, so that the first day turned out to happen in 1972? French-speaking stamp-collectors seem indefatigable! Click on the sheet to see a larger version of it.
Source: $7 from Topical Paradise Limited through eBay, Dec., '08.
Date: 1972