If I'm not wrong, this should be Coelogyne rochussenii, the spikes trailing to a length of almost 1.5m, I think. This specimen is one that I will specially reserve a spot in my garden for. =)
Snippets of info:
Plants bloom throughout the year with forty 6.25 cm wide flowers. Flowers can be fragrant with the scent of lemon.
This species was named after J.J Rochussen, governor-general of the Dutch East Indies in the mid 19th century.
Plant is found growing on large trees in the lowland montane forest of Malaya, Borneo, Java and Sumatra and the Philippines.
Plants are usually grown in baskets. Plant grows in intermediate to warm temperatures with partial shade. Water regularly through the year. Pot in a well drain medium. Pot in a plastic or clay pot with a mix of fine fir bark, tree fern fibers, and perlite or pot in New Zealand sphagnum moss.
source: orchids wiki
I got her home and after 2 weeks, I finally found the time to photograph her blooms in the last stages.