I found another one on ebay for around $25 with shipping. Do your own research on it though as I've never bought silver on ebay. https://www.ebay.com/itm/1973-Fathers-Day-Owl-1-Ounce-999-Silver-Art-Bar-SD33-/253221830013
There must be some collectible value to it as the silver content would be worth around $15.55 right now. Not too bad for a gift. Maybe even give a few of them. :)