National Bank of Switzerland, specimen 50 francs, 1971, prefix 33A, red-brown and green, young girl laureate right, also specimen 100 francs, 1970, prefix 67A, blue and brown, young boy at right, both zero serial numbers (Pick 48ks, 49ls, TBB B333ns, 334ls), red De la Rue seal in field, about uncirculated and scarce (2)