138th: Science & Technology, Automata & Toys

21: Answer Game Calculating Robot, c. 1963

22: Professor Fuller's Slide Rule Calculator Mod. 1

23: The Adder, 1868

24: Curta Type II (Black), 1948

25: Machine d'Arithmétique of 1652

26: National Mod. 442X Cash Register, 1911

27: National Mod. 442X Cash Register, 1911

28: Hagelin C-489-ASX Cypher Machine, 1938 onwards

29: M-209-B Rare American 6-Rotor Cryptographic Machine, 1944

30: Cypher Machine for Deaf People, c. 1970

31: Robot SC electronic Spy Camera, 1982

32: Hellschreiber FFS 002, 1954

33: Hagelin Crypto CD-57 Cipher Machine, 1957

34: Hagelin BC-52 Cypher Machine with Keyboard, 1952 onwards

35: Hagelin C-446-A Cypher Machine, 1944 onwards

36: Hagelin C-446A "MX3003" Cipher Machine, c. 1946

37: Very Rare Ciphering or Deciphering Disc, c. 1944

38: 60-Wheel Cipher Machine, c. 1944

39: USSR "Fialka M-125-3" Cipher Machine, 1965 onwards

40: 2 Original Enigma Wheels in Wooden Box, 1936