granny's trip to Mexico: 1960s flip-it photo album

When my granny died last July, I sat in her office and quietly sifted through her memorabilia. I pulled out this long rectangular item and gasped! The vivid Kodacolor neatly sandwiched into 3.5 x 3.5 inch sleeves and arranged like a waterfall. What is this magic?! This is the Type 20 album produced by the now defunct Atlantic Binders Corporation. It was incredibly hard to find an album of this exact style, with the link being the only documentation I discovered and, coincidentally, also of a 1960s Mexico trip. And at this point, I have to admit that grandma Nancy was indeed my boyfriend's grandma. But before she died, she texted me that I have "truly become one of [her] grans."