In the morning when my head is screwed on straight i'll try and explain things better. From what i understand the appearance of the abacot ranger is identical (phenotype) to the U.S. silver phase welsh harlequin (blue speculum) but is genotypically different. I was involved partially in a thread about this earlier this year and learned a few things, i'm just going to have to dig it out somehow and re-view.
Looked the genotype up in holderreads book, which i highly recommend getting if your are going to raise Harlequins as not only does it give excellent info but Dave also wrote the APA standard on them.
Welsh Harlequin
Pat(d)Pat(d), So(so)So(so), Li(h)Li(h)...
Editing... (sorry had to call it a night...i mean morning) 12:41