Varianto Tunnel 3010/31     This early 3010/31 Tunnel (from my collection) is made of metal. The later versions being made of plastic. The Varianto track clipped into the slot seen going through the middle of the tunnel     These were sold boxed alone, with one Varianto auto and wire track and in various Varianto play sets. Tunnel with 3041 Limo Set. Tunnel with 3042 Lasto Set. Note the 3010/0 number on the box flap, many sets bore this part number. Tunnel and Accessorys included with small boxed sets.