Small vintage old children's desk

Small old vintage desk. Drawer cabinet from the late 60s/70s. With drawer rails. And removable extension. Which is held with a small cleat, made at home. We can see in the last photo that there is a slot on the leg at the top left which can be glued with wood glue, but does not change the solidity of the furniture. Height 68, length 80 + 36 extension. Depth 45. opening of 40 for the seat.