i recently got my hands on this Smurf cartridge. it's definitely PAL, it's definitely made by CBS. DP7 lists the cartridge by CBS with serial number #4L-1768.
mine has a number of #4L1767. i don't know if this cart is any different than 1768, but i thought i'd see if anyone else knows if this is a different game, print run, or whatever else.
included here is a scan of the label. note the serial number on the left side of the label.