"Buvard a Conserver" ("a blotter to keep") from Joannic Fabrics

Title: "Buvard a Conserver" ("a blotter to keep") from Joannic Fabrics
Description: 1950? "Buvard a Conserver" ("a blotter to keep") from Joannic Fabrics, featuring a crow holding a piece of cloth over an expectant fox. 5¼" x 8¼". $5 from Dany Wolfs, Roeselare, Belgium, Nov., '01.

This very large cream-colored blotter with a black-and-white design of FC advertises a fabrics store "that impresses through its prices." It seems to sell all sorts of cloth. Might the telephone number with only three digits be a clue to its date?
Source: $5 from Dany Wolfs, Roeselare, Belgium, Nov., '01.
Date: 1950?