H.A.S.H. Jeans

Who remembers the early 70s and the amazing era of HASH jeans? I wore a lot of these. Unlike most jeans which had either very stiff snaps or buttons along with a zipper, you fastened them with a block of four (or was it six?) easy to do/undo snaps and no zipper. As they were almost all loose fitting bell-bottoms, they literately fell to the floor when you undid them. Super comfortable and easy to remove. I'm having a difficult time finding much about them on the internet. Someone told me that they were limited in where they were sold and that Western Canada was one of the hotspots. This poster, which features a nude woman, suggests a marketing scheme unlike any I remember from the Pant Shack.