This is a very accurate portrayal of a World War II era spy using a Riga Minox to photograph documents. In one shot you can actually read the serial number of the camera, 16722, engraved on the inside of the camera, visible when she opens it to retrieve the film cassette. So no anachronisms here but unfortunately the actress holds her finger over part of the lens, a common enough error with actors generally unfamiliar with how this little camera works.