Delicate Vintage Watercolor of Dog Fish with Yolk Sac butcher block which has not led me

which has not led me to a certain attribution

including the back side of each

I just found three of these lovely old cut paper weavings

with the hand-painted pipe rendered in relief

like this double-side Open House / Auction sign (and two others

Delicate Vintage Watercolor of Dog Fish with Yolk Sac butcher block which has not led meSince finding this vintage watercolor, which I just thought was amazing looking, I've learned that dogfish are thought to have the longest gestation period of any vertebrate (up to 24 months) and practice a form of live birth called yolk sac viviparity basically, the baby sharks hatch inside their mother and get nutrition from the attached yolk sac for an addition 17 19 months until being born as miniature sharks. So the watercolor here is of a