Sir, they are indeed exquisite ! Have you also grown Lachenalia Viridiflora? Have you tried propagation through leaf cuttings? These bulbs must be at least 5 years old.
I have a bulb of Lachenalia Viridiflora bulb which is in a stage for dormancy for the past 2 years. It may grow now as i examined the bulb today which was now showing some signs of sprouting.