Solid wood zippered bookend, folding, 1900

Old bookends with solid wood slide, folding, from the early twentieth century, perhaps older. In good condition, with some traces of wear. The bookhouse is 50 cm long when opened, 35 cm long closed. The slide is a bit hard but still functional. The original label is still present. We distinguish the name of the manufacturer and an address "boulevard poissonnière" in paris.