There are multiple breeders that have tried/are trying to produce a super proven pinstripe but I haven't heard of many definitive ones. I believe BHB had a pinstripe that produced over 27 pinstripes without producing a normal. I've heard of an emperor pin that produced over 50 pinstripes without producing a normal. If pinstripe had a visually different homozygous form I think they would be a big combo and it would be very well known.