Fratello wrote an article on this watch six years ago and can be found here:

 

 

1966 Omega Speedmaster 105.012 B&Ps

£15,500.00Price
  • Reference: ST 105 012 - 66

    Serial: 24xxxxxx

    Year: 1966

    Case: Stainless steel, Assymmetrical case, signed Omega plexi (original)

    Dial:  Stepped dial, T Swiss T, original lume on dial and hands

    Dimensions: 42 mm excluding crown

    Function: Chronograph timing, time keeping

    Caliber: 321

    Strap: Omega bracelet  1039 (67) / 516 endlinks