The mural inside the Heritage Room of the Ateneo de Manila Grade School shows images from the 150-year history of the school. Based on this, the school has had four seals since it was first established as the Escuela Municipal de Manila in 1859. It also has had two special, double seals. One was to commemorate the 100th anniversary of the school, and the other its 150th—its sesquicentennial, which filled this blog back in 2009.
I didn't go up to the mural to check what it was made of, but I doubt very much if it was handpainted. Tomorrow, I'll show you the room where I saw the mural.