This strain is sold commercially in the smartshops in The Netherlands as "Thai cubensis". A very nice strain to grow, although the mushrooms themselves are not that big, the huge first flushes make up for this. This strain produces very well and easy. No cold-shocking is required.
The picture show a some very mature first flush mushrooms grown on sterilised rye cased with peat/lime.

source - www.mushmush.nl