Paph. Rod McClellan is Sheerline x Golden Acres, a nice yellow-green from notable parents. It was first registered by McClellans, which operated as an orchid nursery in the San Francisco Bay Area, in the 1970s; the grex was more recently remade by Hillsview in the early 2000s. Your clone, ‘Three Star’, does not appear in any of the reference material I have, but, as this was a very well-distributed grex (including to England; at least one clone has an RHS award), unawarded named clones are not particularly surprising.
I remember when the McClellan's changed over their orchid nursery to something else..I was living in Fremont, Ca..1992 I believe..It was the end of an era in that area..The Tonkins and The Cattleya guy (Forsythe Orchids ?) in Livermore also...all gone in the same timeframe. My first Paph was a complex from McClellan's in that year